Examples of commensalism are Whale and barnacles, for Parasitism human lice on the scalp, for mutualism Legumes and Rhizobium, for competition leopards and lions, and for predation shrews hunting worms and insects, or owls hunting mice.
(a) Commensalism is the association of organisms in which one organism gains while the other does not. For instance, whales and barnacles.
(b) Parasitism is a relationship of creatures where one life form is benefitted to the detriment of another. For instance, human lice on the scalp.
(c) Mutualism is a relationship between organisms in which both parties benefit. Legumes and Rhizobium are two examples.
(d) Competition between organisms of two distinct species for a common resource is referred to as interspecific competition. Take, for instance, the competition between leopards and lions over common prey.
(e) Predation occurs when one organism devours and kills another. The organism that kills, the predator, to the detriment of the organism that is being consumed, the prey, receives energy from predation in order to extend its lifespan and encourage reproduction. examples of predation are shrews hunting worms and insects, or owls hunting mice.
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Match the correct statement with the antibody type to test your understanding of structure and functions of antibodies
A.) Most prevalent antibody in circulation
B.) Dimer that is a significant component of mucus and secretions
C.) Pentameric in circulation
D.) Main function is to serve as antigen receptor on B-cell surface
E.) Mediates allergic responses
1.) IgM
2.) IgA
3.) IgE
4.) IgD
5.) IgG
The proteins that make up antibodies are Y-shaped and are also known as immunoglobulins. When any pathogen infects the body, the antibody is created. The five main categories of antibodies
What types of antibodies are there?
The immune system creates an antibody when it detects harmful substances, also known as antigen. Antigens include substances and microorganisms (bacteria, fungi, parasites, and viruses).
Where can one find antibodies?
Immunoglobulins and antibodies
Blood, as well as other tissues and other fluids, include immunoglobulins. They are created by the immune system's plasma cells, which are descended from B cells. When a certain antigen binds to the surface of an antibody, B cells in the immune system are activated and develop into plasma cells.
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which of the following is not one of the accessory organs for digestion? a. spleen b. pancreas c. liver d. gallbladder
Among the following, (a) the spleen is not one of the accessory organs for digestion.
The digestive system is made up of the digestive tract as well as the organs that are accessory to it. The oral cavity, pharynx, esophagus, stomach, small intestine, and large intestine are all parts of the digestive system, sometimes known as the gastrointestinal tract. Teeth and the tongue are examples of accessory organs, as are glandular organs including the salivary glands, liver, gallbladder, and pancreas. Other accessory organs include the pancreas.
While the spleen's primary job is to defend the body against any pathogens that may have entered the bloodstream. It maintains a constant quantity of blood cells throughout the body. The spleen is responsible for regulating the number of platelets, red blood cells, and white blood cells in the blood. So the correct option is A.
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sort the statements into the appropriate bins depending on whether they represent factors that varied from participant to participant at the start of this study, factors that were consistent from the start of the study, and factors that were measured in the study.
Factors that were consistent from the start of the study, and factors that were measured in the study. Factors that varied from the start of the study: smoking status, total food intake, % of different types of fats eaten, activity level
Factors kept consistent: sex of participant
Outcome: number of non-fatal heart attacks, deaths from coronary heart disease
For the Psychonomic Society, Springer Science+Business Media publishes Learning & Behavior, a quarterly peer-reviewed scientific magazine. The publication was started in 1973 under the name Animal Learning and Behavior, and it was given its current name in 2003. [1] Jonathan Crystal is the editor-in-chief at the moment, having previously been Abram Amsel (Indiana University). The journal publishes studies on the basic mechanisms that underlie animal learning and behaviour (including humans).
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which of the following claims is best supported by the data in the table? responses the european toad is a k -selected species because it has a type iii survivorship curve.
K-selected species is one that produces few offspring per reproductive event, and the black rhino is one of these.
Because there are fewer Type 1 offspring and they receive more parental care, they have a greater survival rate, which increases the likelihood that they will live to adulthood before passing away.
Type 1 displays a curve where the majority of people die off as they get older. Due to the time and energy required for parental care, which results in their species dying out at an advanced age, this curve depicts the reproductive behavior of K-selected species.
Women started having children later in life as a result of more options for education.
Lengthy gestation durations of many months, slow maturation (and hence prolonged parental care), and long life spans are traits of K-selected species.
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some antibiotics fail to kill/inhibit a pathogen simply because the microbe is naturally (intrinsically) resistant to it.
Some antibiotics fail to kill/inhibit a pathogen simply because the microbe is naturally (intrinsically) resistant to it is true.
Bacteria use pumps embedded in their cell walls to remove antibiotics that enter the cell. Fluoroquinolones, beta-lactams, chloramphenicol, and trimethoprim are among the key antibiotics that some Pseudomonas aeruginosa bacteria may expel from their bodies.
The targets that antibiotics connect to are absent from viruses because they lack metabolic activity. Instead, antiviral drugs that target particular phases of the viral replication cycle must be used to treat viruses.
The overuse, misuse, and ineffective infection control of antibiotics all increase the emergence of antibiotic resistance.
Your body does not develop antibiotic resistance. False. When bacteria change, an antibiotic that was formerly used to cure them becomes useless. This is called antibiotic resistance.
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Arrange the steps used to create a subunit, or piggyback, vaccine in the correct order, beginning with the first step at the top.Recombinant DNA is inserted into the harmless virus, and many copies of the recombinant virus are produced DNA is extracted from a pathogenic virus, and a gene encoding a surface protein of the virus is isolatedThe harmless virus with recombinant DNA is injected into the human body Antibodies to the pathogenic virus' surface protein are made, and immunity is developedDNA from a harmless virus is extracted and cleaved, and the surface protein gene from the pathogenic virus is combined with the harmless DNA
The correct steps to create a subunit or vaccine are:
DNA is extracted from a pathogenic virus, and a gene encoding a surface protein of the virus is isolatedDNA from a harmless virus is extracted and cleaved, and the surface protein gene from the pathogenic virus is combined with the harmless DNA.Recombinant DNA is inserted into the harmless virus, and many copies of the recombinant virus are produced.The harmless virus with recombinant DNA is injected into the human body.Antibodies to the pathogenic virus' surface protein are synthesized, and immunity is developed.Vaccine is a medicated preparation that protects the body from harmful pathogens. It does so by enhancing the immune system of an organism against the disease caused by the pathogen.
Antibodies are the part of immune system produced naturally as a result of infection in the body. There function is to protect the body against the invaders.
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What is proactive interference as it relates to memory?
A disruption to memory that occurs when there are no contextual clues available
A disruption to memory that occurs when someone is in a different mental state
A disruption in memory that occurs when new information impacts old memories
A disruption in memory that occurs when old information impacts new memories
A disruption in memory that occurs when old information impacts new memories is proactive interference as it relates to memory. So, the correct option is (D).
What is Proactive interference?Proactive interference theory is the type of theory regarding human memory that occurs in learning. The assumption is which memory encoded in long-term memory is forgotten and cannot be retrieved in short-term memory because either memory can interfere with the other.
This occurs when old memories interfere with the retrieval of new memories. Because older memories are often better rehearsed and more strongly cemented into long-term memory, it becomes easier to recall previously learned information rather than recently learned information.
Proactive interference is pro-forward which occurs when we are unable to learn a new task because of an old task that has already been learned.
Thus, a disruption in memory that occurs when old information impacts new memories is proactive interference as it relates to memory. So, the correct option is (D).
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if a clade of organisms approaches the diversity equilibrium, k, which of the following might occur? A. Diversification will approach zero. B.The number of taxa will stabilize. C.Speciation rate will decline. D.Extinction rate will increase E. ny of these could occur near diversity equilibrium
An organism clade is getting close to the diversity equilibrium. The following might happen Eventually, diversification will be nil.
What makes it an organism?An entity with life is referred to as an organism. In essence, molecules make up both living things and non-living things. A living entity, however, may be distinguished from an inanimate object by its distinguishing traits. For instance, a cell or several cells make form an organism.
Do living things exist?An organism is a form of life that is capable of reproduction: The ability to duplicate oneself is one of the traits of organisms, but this trait is shared by many other biological entities as well, including cells, DNA, organelles, and even even communities.
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the sternocleidomastoid muscle will laterally flex the cervical spine to the ipsilateral side and rotate the cervical spine to the ipsilateral side.
The cervical spine will be rotated to the ipsilateral side and laterally flexed to that side by the sternocleidomastoid muscle. These muscles, which are part of the erector spinae, are attached to the ribs and work to stabilize the thoracic vertebrae during extension.
A paired superficial muscle in the front of the neck is called the sternocleidomastoid (SCM), also known as the musculus sternocleidomastoideus. The sternocleidomastoid muscle (SCM), which separates the neck into an anterior and a posterior triangle, is a significant landmark in the area. This muscle connects the sternum and clavicle to the skull. It guards against harm to the neck's soft tissues, including the deep cervical lymph nodes, branches of the cervical plexus, and the vertical neurovascular bundle.
It has two heads that emerge from it: a lateral fleshy clavicular head and a medial rounded and tendinous sternal head (SH) (CH).
They come from the medial third of the superior surface of the clavicle and the anterolateral surface of the manubrium sterni, respectively. The CH has a variable thickness. The smaller supraclavicular fossa, a triangle surface depression, divides the two heads. In order to generate a fat, rounded belly, the CH spirals behind the SH as they climb and combines with its deep surface just below the middle of the neck.
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What type of hormones affect plant growth and the development of fruits and seeds?
a.auxin
b. gibberellin
c. ethylene
d. cytokinin
b. gibberellin is the type of hormone that affects plant growth and the development of fruits and seeds.
Gibberellins are a class of plant hormones that play an important role in plant growth and development. They are involved in many processes, including the elongation of stems and roots, the formation of flowers and fruits, and the germination of seeds. Gibberellins are also involved in the regulation of other hormones, such as auxins and cytokinins.
Other types of hormones that affect plant growth and development include auxins, which are involved in the regulation of cell growth and differentiation, and cytokinins, which promote cell division and the growth of roots and shoots. Ethylene, another plant hormone, is involved in the ripening of fruits and the response to stress.
Drag and drop the labels to put the events of the primary and secondary immune responses in the correct order Some labels may be used more than once. Primary immune response:
Secondary immune response: [Labels]
New pathogen enters body. Macrophages engulf pathogen Macrophages display pathogen antigens Helper T cells bind to pathogen antigens Interleukins are released. Cytotoxic T cells and B cells are activated Antibodies and memory cells are produced Pathogens are destroyed. Pathogen with familiar antigens enters the body. Memory B cells and T cells bind to pathogen antigens.
The events of the primary and secondary immune responses in the correct order are as follows -
Primary immune response -
1. New pathogen enters the body.
2. Macrophages engulfs the pathogen.
3. Macrophages display pathogen Antigens.
4. Helper T cells bind to pathogen Antigens.
5. Interleukins are released.
6. Cytotoxic T and B cells are activated.
7. Antibodies and memory cells are produced.
8. Pathogen are destroyed.
Secondary immune response -
1. Pathogen with familiar antigens enters the body.
2. Memory B cells and T cells bind to pathogen
3. Cytotoxic T cells and B cells are activated.
4. Pathogens are destroyed.
An immune response is a reaction which occurs inside an organism for the purpose of protecting towards foreign invaders. those invaders include a wide variety of different microorganisms such as viruses, parasites, and fungi which can purpose severe problems to the health of the host organism if not cleared from the frame.
There are two wonderful aspects of the immune response, the innate and the adaptive, which collectively defend against pathogens. The innate branch—the body's first reaction to an invader—is understood to be a non-unique and quick reaction to any form of pathogen. Components of the innate immune response encompass bodily barriers just like the skin and mucous membranes, immune cells together with neutrophils, macrophages, and monocytes, and soluble elements which includes cytokines and complement.
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megan underwent surgery for a tumor that damaged the primary motor cortex on her left hemisphere. we can expect that megan will
Laugh out loud when someone makes a funny joke, yet I can't make myself grin for a picture.
When you hear someone laughing behind you, you usually imagine them talking on the phone or laughing with a friend while grinning and feeling cozy inside.
Most likely, just hearing the laughter will make you grin or perhaps laugh along with them. However, picture the individual who is laughing simply strolling by themselves down the street or sitting behind you at a funeral. It suddenly seems less appealing.
In actuality, laughter isn't always a good thing or healthy. Science has identified several different varieties of it, including diseased, simulated (false), stimulated (for instance, by tickling), produced (by medications), and genuine and spontaneous.
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Gross Internal Anatomy of the Pig or Sheep Kidney 3 Match the appropriate structure in column to its description in column A. (Some responses may be used more than once Column A Column B cortex 1 smooth membrane clinging tightly to the kidney surface cortex
2. portion of the kidney containing mostly collecting ducts medulla 3.portion of the kidney containing the bulk of the nephron structures calyx 4. superficial region of kidney tissue renal column 5. basinlike area of the kidney, continuous with the ureter fibrous capsule 6. an extension of the pelvis that encircles the apex of a pyramid renal pelvis 7. area of cortexlike tissue running between the renal pyramids
The gross internal anatomy of the pig or sheep kidney includes the fibrous capsule, cortex, renal column, medulla, renal pelvis, and calyx. Each of these components serves an important role in the functioning of the kidney and in the process of urine production and transport.
The gross internal anatomy of the pig or sheep kidney consists of a variety of important structural components. The most superficial layer is the fibrous capsule, a smooth membrane clinging tightly to the kidney surface. Underneath the fibrous capsule is the cortex, a portion of the kidney containing mostly collecting ducts. The cortex is separated from the medulla by a thin line of cortexlike tissue known as the renal column that runs between the renal pyramids. The medulla is the portion of the kidney containing the bulk of the nephron structures, such as the loop of Henle and distal convoluted tubule.
The renal pelvis is an extension of the pelvis that encircles the apex of a pyramid and is continuous with the ureter. The renal pelvis is the basinlike area of the kidney that collects the urine from the nephrons and transports it to the ureter.The calyx is the area of cortexlike tissue located at the base of the renal pyramid. The calyx is responsible for collecting urine from the nephrons and transporting it to the renal pelvis.
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Scientists have suggested that the autonomic nervous system is not well-adapted to modern human life. How is the sympathetic nervous system an ineffective response to the everyday challenges faced by modern humans?
(The autonomic nervous system or ANS is referred to as the vegetative nervous system, which controls the muscles of internal organs such as the heart, stomach, intestine, and glands.
The sympathetic nervous system is involved in fight and flight response and prepares the body for potential danger.)
Explanation:There are many events in human life that are not potential physical threats such as feeling nervous before exams or paying loans activate humans' sympathetic nervous systems but these stressful situations do not require a fight or flight response for survival.
MARK AS BRAINLIESTInvolved in the fight-or-flight reaction and assisting the body in getting ready for possible threats is the sympathetic nervous system.
The Autonomic Nervous System (ANS), also known as the vegetative nervous system, regulates the muscles of the heart, stomach, intestine, and glands. When fight-or-flight mode is activated, the SNS slows down unnecessary bodily processes like metabolism and redirects that energy to improve your muscular output, respiratory rate, reflexes, and other processes that will assist you in dealing with a hazardous or physically taxing circumstance. Human life is filled with numerous challenging scenarios that do not pose a risk to physical safety, such as feeling anxious before examinations or paying bills or stress in the workplace, nonetheless causing the sympathetic nervous system to be activated.
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at the onset of a bout of exercise, tissue (click to select) levels briefly increase due to elevated aerobic respiration.
At the onset of a bout of exercise, tissue carbon dioxide levels briefly increase due to elevated aerobic respiration.
Your body needs more oxygen and creates more carbon dioxide while you exercise because your muscles are working harder. Your breathing must rise from about 15 times per minute (12 litres of air) at rest to between 40 and 60 times per minute (100 litres of air) during exercise in order to meet this additional demand.
Increased gas exchange at the lungs occurs as a result of aerobic energy production in muscles because more oxygen and carbon dioxide are taken in. These metabolic gases are transported to and from your tissues by your blood.
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which of the following is the best example of gene flow? group of answer choices genes are shuffled by chromosomal crossing over during meiosis. wind blows pollen from one population of plants to another and cross-fertilization occurs. a polyploid plant develops because of an error in mitosis. an earthquake results in the formation of a canyon, dividing a population of toads.
The best example of gene flow among the following is that the (b) wind blows pollen from one population of plants to another and cross-fertilization occurs.
In higher plants, cross-fertilization occurs when pollen grains from one plant's cones or flowers are transmitted to another plant's cones or flowers that are producing eggs. Cross-pollination can take place via wind, as it does in conifers, or by symbiotic partnerships with various creatures (such as bees, certain birds, and bats) that spread pollen while consuming nectar from one plant to another.
Animals use a wide variety of cross-fertilization techniques. The majority of animals that reproduce in watery situations externally fertilise after both the male and female have lost their sex cells into the water.
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FILL IN THE BLANK. __________ has the ability to target cells of the body that are infected with pathogens, while also responding to any pathogens that are free in the blood or interstitial fluid of the body.
Adaptive immunity has the ability to target cells of the body that are infected with pathogens, while also responding to any pathogens that are free in the blood or interstitial fluid of the body.
When do macrophages consume pathogens?Alerting the immune system to microbial invasion is another job that macrophages do. A macrophage that has consumed a microbe displays an antigen—a protein that alerts a related T helper cell to the presence of the antigen—on its cell surface.
What transpires when a phagocyte consumes a pathogen?Phagocytes are a specific type of cell that can take in and occasionally digest foreign substances like bacteria, carbon, dust, or dye. By creating a vacuole around the foreign particle and expanding its cytoplasm into pseudopods (cytoplasmic appendages that resemble feet), it engulfs foreign objects.
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liver and other organ meats contain large quantities of nucleic acids. the digestion of such foods involves rna hydrolysis, which results in the formation of free ribose. this free ribose can then enter the nonoxidative phase of the pentose phosphate pathway (ppp). arrange the steps to outline the mechanism by which free ribose can be used as a fuel for glycolysis.
Ribokinase phosphorylates ribose, while transketolase catalyzes the reaction between ribose 5-phosphates and xyluise 5-phosophates in nucleic acids.
What accomplishes the PPP pathway?From glucose 6-phosphate (G6P), the pentose phosphate pathway (PPP) diverges, yields NADPH and ribose 5-phosphate (R5P), and diverts carbons back to the glycolytic or gluconeogenic route. It has been shown that the PPP plays a significant role in controlling cellular redox (reduction-oxidation) homeostasis and biosynthesis.
How is the PPP for the pentose phosphate pathway regulated?High G6PD activity is anticipated to lead to an increase in the biosynthesis of lipids and DNA, both of which are required for cell division and proliferation. G6PD directly regulates the PPP flux, which produces R5P for the biosynthesis of nucleotides and NADPH for reductive biosynthesis and ROS scavenging.
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organisms respond to changes in their environment through behaviour and physiological mechanisms.give a specific example of a behavior mechanism and physicological mechanism of an organism.
Behavioral and physiological factors help organisms adapt to environmental changes. Plants that exhibit phototropism and photoperiodism as examples. Animal kinesis and taxis.
How do organisms' physiology and behavior alter in response to environmental changes?Behavioral and physiological factors help organisms adapt to environmental changes. Animal kinesis and taxis: Some animals use kinesis to change their position (a change in activity or turning rate in response to a stimulus).
Give examples of how living organisms react to environmental changes.Living things react to environmental changes. For instance, the Mimosa (touch-me-not) plant's leaves droop when you touch them. In this instance, the plant is drooping its leaves in response to the stimulus of contact.
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A mutation in GLUT4 changes the Kt value from 5mM (wild type) to 3mM (mutant). The velocity of glucose entry into a mutant cell would be higher than a cell expressing the wild type version of a blood glucose concentration of 5mM.
True
It is true to say that a GLUT4 mutation reduces the Kt value from 5mM (wild type) to 3mM. (mutant). The rate of glucose entry into a mutant cell at a blood glucose concentration of 5 mM would be faster than into a cell expressing the wild type form.
A gene on chromosome 17 codes for GLUT 4, a protein that transports genetically encoded glucose and is found in adipocytes, skeletal muscle, and cardiac muscle. It has a 5 mm Km for glucose. The majority of GLUT 4 is stored in intracellular vesicles when there is not a sufficient stimulation.
We created transgenic mice that produce large quantities of the GLUT4/muscle-fat specific facilitative glucose transporter in a tissue-specific way to better understand the physiological function of this protein in controlling glucose homeostasis. Examining two different founder lines revealed that high-level GLUT4 protein expression markedly decreased fasting glucose levels in comparison to wild-type mice (around 130 mg/dl) by about 70 mg/dl.
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Correct Question:
A mutation in GLUT4 changes the Kt value from 5mM (wild type) to 3mM (mutant). The velocity of glucose entry into a mutant cell would be higher than a cell expressing the wild type version of a blood glucose concentration of 5mM. State True or False
What motivates you? How do your emotions affect your motivation? What other factors have an influence on your motivation level? Do you find a connection between your emotions and motivation? How do you motivate yourself to get course-work done? What techniques or tools would you recommend to help others improve motivation to complete their education?
What motivates you depends from person to person. Motivation is the inner drive to act. It's the conditions that motivate you. If your conditions can not motivate you then nothing can motivate you. I motivate myself. According to me, no one can motivate you if you can't get motivated by yourself.
Emotions are directly attached to motivation. We must control our emotions. Yes, there is a connection between emotion and motivation.
How do you motivate yourself to get coursework done?
Plan your day. Set short-term goals. Recognize your power then set long-term goals.
There are several strategies to improve motivation to complete their education. Teachers must praise their students, give rewards and a variety of exercises.
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Complete a phylogenetic tree of Bilateria that includes the ten phyla of bilaterians. Label each branch that leads to a phylum with a C, H, HC, or N, depending on whether members of the phylum have a coelom only (C), hemocoel only (H), hemocoel and reduced coelom (HC), or no body cavity (N). Drag the appropriate labels to their respective targets. Labels can be used once or more than once. Reset Help с Echinodermata Deuterostomia Chordata N - Platyhelminthes N Lophotrochozoa Syndermata H Ectoprocta HC Brachiopoda
Complete a phylogenetic tree of Bilateria that includes the ten phyla of bilaterians are (C) echinodermata to (HC) arthropoda.
A phylogenetic tree is a branching diagram or a tree showing the evolutionary relationships among various biological species or other entities primarily based upon similarities and differences in their physical or genetic characteristics. All life in the world is part of a single phylogenetic tree, indicating commonplace ancestry.
(C) echinodermata
(C) chordata
(N) platyhelminthes
(H) syndermata
(C) ectoprocta
(C) brachiopoda
(HC) mollusca
(C) annelida
(H) nematoda
(HC) arthropoda
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Short segments of newly synthesized DNA are joined into a continuous strand by
ligase
Short segments which is newly synthesized DNA and have joined a continuous strand by using ligase.
The DNA ligase enzyme joins these tiny fragments of newly manufactured DNA, which are known as Okazaki fragments after their discoverer. This results in the formation of a complete new DNA strand. Okazaki fragments are the brief pieces of freshly synthesized DNA that serve as the foundation for the lagging strand.
The DNA helicase separates the strands while the primase and polymerase must continuously stop and start since they travel in the opposite direction of the fork. Once the pieces have been created, DNA ligase joins them together to form a single, continuous strand. Okazaki fragments are brief pieces of DNA that have undergone replication. The lagging strand, which is made of Okazaki fragments, is a kind of DNA. The DNA ligase enzyme joins these pieces together.
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Correct Question:
Short segments of newly synthesized DNA are joined into a continuous strand by _____.
FILL IN THE BLANK. according to the administration on aging (aoa), 70% of older adults with are unaware they have a serious health condition.
According to the administration on aging (aoa), 70% of older adults with High cholesterol are unaware they have a serious health condition.
When the amount of cholesterol in your blood is high enough to put you at risk for heart disease and stroke, you have high cholesterol. High cholesterol, also referred to as hyperlipidemia, is painless and has no symptoms until a person develops significant heart disease.
Stroke is the fifth most common cause of death in the US, according to the Centers for Disease Control and Prevention (CDC). Heart disease is number one.
Every cell in your body contains cholesterol, a thick, fatty substance that is made by your liver and is crucial for numerous processes that keep you alive. Additionally, it is a component of bile, a substance your body produces to aid in food digestion, and it aids in the production of hormones and vitamin D in your body.
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Sharks, whales, and dolphins share similar features such as body shape and the position of fins. However, sharks have gills for breathing, while
whales and dolphins have lungs. These differences indicate that the organisms share a common ancestor for
Whales also possess a vestigial pelvic bone. The presence of the pelvis bone may indicate that whales
Sharks are a part of the elasmobranch family, which incorporates sharks, rays, skates, and sawfish, at the same time dolphins, are a part of the cetacean family, which incorporates toothed and baleen whales, in addition to porpoises.
What is common between shark and dolphin?Both sharks and dolphins commonly have what's known as counter shading in which their bellies are lighter than their backs, which is a beneficial manner to combo into the marine environment. Dolphins and sharks each have dorsal fins on their backs, pectoral fins on their sides, and a tail. Therefore it is clear that it sharks a common ancestor.
Streamlined our bodies and fins offer a huge gain for them, permitting them to swim faster. We recognize that dolphins and sharks aren't carefully related and that they did not inherit their comparable frame shapes from a not unusual place ancestor. Their streamlined bodies, dorsal fins, and flippers are the end result of convergent evolution.
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04.4. Which statement below is TRUE about neurotransmitters? The entry of neurotransmitter through Kt channels into neurons triggers the rising phase of the action potential Neurotransmitters are released from muscle cells to activate motor neurons in the presence of botulinum toxin Neurotransmitters are released from neuron when Ihe action potential reaches the end of its axon All of the above Submit
Neurotransmitters are chemical messengers that are released from the neuron as the action potential reaches the end of the axon. The correct statement is the third statement.
Neurotransmitters are chemical messengers and they relay signals between the neurons. As the action potential reaches the end of the axon, the vesicles consisting of neurotransmitters fuse with the presynaptic membrane and neurotransmitters are released in the synapse.
These neurotransmitters then bind with the receptors at the postsynaptic neuron. The effect of the neurotransmitter depends on the kind of the receptor and the kind of the neurotransmitter involved. The resulting effect can be either the inhibition or excitation of the postsynaptic neuron.
The entry of neurotransmitters through K+ channels into neurons does not lead to the rising phase of the action potential. The rising phase of the action potential is triggered by the opening of voltage gated ion channels that cause an influx of sodium ions.
Neurotransmitters are not released from muscle cells to activate motor neurons in the presence of botulinum toxin; rather, it leads to the inhibition of neurotransmitter release from muscle cells causing muscle paralysis.
Neurotransmitters are chemical messengers released in response to the action potential which is generated by the movement of sodium and potassium ions across the axon membrane. They are released into the synapse when the action potential reaches the end of the axon. This release is inhibited in presence of botulinum.
In conclusion, neurotransmitters are released from neurons when the action potential reaches the end of its axon.
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Suppose you have designed a double-stranded RNA to knock down a gene, gene Z The phenotype of the RNA¡-treated cells is the same as the phenotype of the gene Z null mutation. Which of the following is targeted by the dsRNA? (a) tRNA (b) rRNA (c) gene Z mRNA (d) gene Z DNA (e) gene Z protein
If you have created a double-stranded RNA to knock down gene Z, it targets gene Z mRNA among the possibilities provided.
What is mRNA?Single-stranded RNAs of the type known as messenger RNA, or mRNA, are used to make proteins. mRNA is created during transcription from a DNA template. It was named mRNA by Jacob and Monad.
Null mutation: what is it?A null mutation is a variation in the genetic sequence that can result in the total deletion of the protein encoded by the gene by impairing either the transcription of the gene's product into RNA or the translation of the RNA sequence into protein.
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In humans, brown eyes (B) are dominant over blue eyes (b). A brown-eyed woman who has a blue-eyed child would have the genotype:A. Bb.B. BBB.C. BbBb.D. bb.E. BB.
In humans, brown eyes (B) are dominant over blue eyes (b). A brown-eyed woman who has a blue-eyed child would have the genotype is C. BbBb.
Step 1: To determine the genotype of the brown-eyed woman, we must first look at the possible genotypes of the child. Since the child has blue eyes, we know the child must have at least one recessive allele (b) in their genotype.
Step 2: Since the woman has brown eyes and the child has blue eyes, we can infer that the woman must have at least one dominant allele (B) and one recessive allele (b).
Step 3: Given these pieces of information, the woman must have either the BB or Bb genotype.
Step 4: Therefore, the genotype of the brown-eyed woman is either BB or Bb.
Genotype is an individual's genetic makeup, which is made up of a combination of alleles at particular loci on chromosomes. It is the set of genetic instructions that determine the physical characteristics of an organism, such as physical appearance, growth rate, and even behavior. Genotype is often contrasted with phenotype, which is the physical manifestation of the genotype.
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i. describe (list) the events from the time calcium ions enter the terminal axon at the neuromuscular junction through muscle cell contraction.
Acetylcholine is released into the neuromuscular junction when Ca+ ions are released. It permits the channel to open, allowing Ca+ ions into the muscle fiber and K+ ions out. The electrical conditions in the membrane alter as a result, and depolarization occurs.
It generates an action potential, which passes through the cells before contracting.
Neurotransmitter release from the presynaptic terminal involves a number of complex steps: depolarization of the terminal membrane, activation of voltage-gated Ca2+ channels, Ca2+ entrance, change in docking protein structure, and fusing of the vesicle to the plasma membrane, with following
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micrornas regulate gene expression by bringing the risc complex to a mrna with perfectly complementary sequence, which allows the risc complex to cut the mrna into two pieces
The expression of miRNAs is driven by multiple factors and molecular mechanisms, ranging from those affecting DNA copy number, CpG methylation, transcription factors and miRNA biogenesis to those affecting the availability of miRNA binding sites on mRNAs.
MicroRNAs regulate gene expression primarily by binding to messenger RNA (mRNA) in the cytoplasm of cells. Instead of being rapidly translated into protein, the tagged mRNA is either destroyed and its components recycled or stored and transferred.
The degree of complementarity between guides and mRNA targets determines which silencing mechanism is used. After cleavage of the target messenger RNA (mRNA) and subsequent degradation or inhibition of translation Figure.
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