Answer:
The Carbon cycle is the biogeochemical cycle by which carbon is exchange among the biosphere, Pedosphere, geosphere, hydrosphere, and atmosphere of the Earth
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Christina is worried that her traits are completely determined by the genes passed on to her from her parents. Which of these is least likely to be affected by heredity?.
Option a Christina is worried that her traits are completely determined by the genes passed on to her from her parents. personality likely to be affected by heredity.
The transfer of traits from one set of parents to another is known as heredity, often known as inheritance or biological inheritance. Whether through reproduction, the offspring cells or organisms acquire the genetic makeup of their parents. Genes, also known as alleles, can occur in multiple forms and are responsible for determining hereditary features. Each gene in our cells has two copies (with the exception of genes located on chromosomes). Both the sperm and the egg contribute to one of the copies. These two copies, also known as alleles, may not be identical in a single person. We refer to an individual as homozygous for a gene if the two copies of the gene are identical. A gene is heterozygous if its two copies are distinct.
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DNA molecule has 180 base pairs(A=T) and 20% A. How many C nucleotides are present in this molecule of DNA?
Answer: 53 Cytosine
Explanation:
Let x equal C nucleotides
20% of Adenine = 20% of Thymine20% + 20% = 40%100% - 40% = 60 %60% = Cytosine and GuanineCytosine and Guanine will always have the same amount 30% of Cytosine180 * 0.3 = 5353 Cytosine nucleotidesWhich part of the brain is involved in initiating, or turning on, the desire to eat?.
Answer: lateral hypothalamus
Explanation: A part of the hypothalamus involved in initiating, or “turning on,” eating. ventromedial hypothalamus: A part of the hypothalamus involved in regulating feelings of satiety. neurotransmitters and hormones are involved in regulating hunger and appetite.
If the conservative model had been correct, how many generations of bacterial cell division would have had to pass before meselson and stahl would have observed evidence of a band in the cscl gradient corresponding to a hybrid dna molecule containing both 14n and 15n?.
If the conservative model had been correct, No generations; a hybrid would never form had to pass before meselson and stahl would have observed evidence of a band in the cscl gradient corresponding to a hybrid dna molecule containing both 14n and 15n.
What is the Meselson and Stahl experiment about?
The Meselson and Stahl experiment is an experiment in 1958 by Matthew Meselson and Franklin Stahl. Meselson and Stahl through their experiment demonstrated that DNA replicated semi-conservatively, meaning that each strand in a DNA molecule serves as a template for synthesis of a new, complementary strand
Here's the complete question:
If the conservative model had been correct, how many generations of bacterial cell division would have had to pass before Meselson and Stahl would have observed evidence of a band in the CsCl gradient corresponding to a hybrid DNA molecule containing both 14N and 15N?
A) 1 generation
B) 4 generations
C) More than 10 generations
D) No generations; a hybrid would never form.
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which of the following statements is false? group of answer choices dna replication proceeds in only one direction around the bacterial chromosome multiple replication forks are possible on a bacterial chromosome dna polymerase joins nucleotides in one direction (5' to 3') only the leading strand of dna is made continuously the lagging strand of dna is started by an rna primer
Nucleotides can only be joined in one way (5' to 3') by DNA polymerase.
DNA synthesis or replication takes place during the S phase of a cell cycle, which happens during interphase and comes before mitosis or meiosis.
Describe DNA replication with an example.The act of copying and duplicating a DNA molecule is known as DNA replication. The procedure is run in a semi-conservative manner.
Before dividing, cells must copy their DNA. This promotes successful inheritance of genetic features by giving each daughter cell a copy of the genome. The fundamental mechanism of DNA replication is similar across all organisms, making it a crucial operation.
Three models—conservative, semi-conservative, and dispersive—were put out for DNA replication. According to the conservative way of replication, freshly generated daughter strands and the parental DNA should both remain together.
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Which of the following macromolecules contain the element carbon hydrogen oxygen and nitrogen in their structure?
A: carbohydrates & nucleic acids
B: nucleic acids & lipids
C:proteins & nucleic acids
D: proteins & carbohydrates
Answer:
C: proteins & nucleic acids
Explanation:
Find the quotient. Enter your answer in lowest terms in the box below as a fraction, using the slash mark ( / ) for the fraction bar.
Answer here
If the conservative model had been correct, how many generations of bacterial cell division would have had to pass before meselson and stahl would have observed evidence of a band in the cscl gradient corresponding to a hybrid dna molecule containing both 14n and 15n?.
No generations or hybrid would form before meselson and stahl would have observed evidence of a band in the cscl gradient.
The conservative model predicts that, following a single replication, half of the newly formed DNA double helices will be made entirely of the original, or old, DNA, and the other half will be entirely new. Then, each double helix would be completely replicated during the second round of replication. After that, 25% of the double helices would be all new, and 25% would be entirely old. Thus, the fraction of entirely new DNA double helices would increase with each succeeding round of replication, but the total number of completely unique DNA double helices would remain constant. Therefore, no hybrid DNA molecule containing 14N and 15N is replicated in the conservative model.
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how does the cell wall function work in a plant cell
4-5 sentences
thank you
Answer:
The cell wall is the outermost layer of a plant cell. It works like a protective shield that keeps the contents of the cell inside and prevents water loss. The function of this layer is to protect against harmful substances, such as bacteria and viruses, which can cause diseases in plants. In addition, it also serves as a barrier for gases (such as oxygen) so they do not leak out into the surrounding environment.
Explanation:
What animal would be a prides best option to hunt if the pride requires 106,000 kcals per day if there are 4 hunters that can expend up to 15,000 kcals per day
Answer:
Gezzel
Explanation:
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according to most scholars, life expectancy in the united states increased dramatically after 1900 because of group of answer choices the introduction of smallpox inoculation. the development of new medical treatments. changes in nutrition and living conditions. the natural evolution of epidemics. the natural evolution of microorganisms into less dangerous forms.
According to most scholars, life expectancy in the united states increased dramatically after 1900 because of changes in nutrition and living conditions and is denoted as option C.
What is Life expectancy?This is a term which is used to depict the statistical measure of the average time an organism is expected to live and is based on various types of factors such as the gender, age etc.
In the late 1900, there was an increase in the life expectancy because of the different forms of developments and technological innovations which were done.
Other reasons which led to it increasing drastically in the United states after 1900 was because of the changes in nutrition and living conditions which is therefore the reason why it was chosen as the correct choice.
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Eukaryotic cells contain several organelles with a variety of functions. If a
cell's lysosomes were damaged, which of the following would most likely
occur?
A The cell would be less able to break down molecules/waste in its cytoplasm.
B The cell would reflect more yellow pigment than green pigment.
C The cell would no longer be able to store DNA in its nucleus.
D The cell would produce more proteins than it needs.
Answer: A The cell would be less able to break down molecules/waste in its cytoplasm.
Explanation:
"Lysosomes act as the waste disposal system of the cell by digesting used materials in the cytoplasm"
During the assessment of a patient with a brain abscess, the nurse notes elevated blood pressure and altered level of consciousness. Which additional symptoms should the nurse assess for?.
Symptoms may vary depending on the location of the brain abscess. It includes headache and nausea due to increased pressure in the brain. Neurological symptoms may also be present but in very rare cases.
Common symptoms of the disease are fever, headache, and nervous system problems such as confusion, difficulty in speech or walking change and arm/ leg weakness on one side.
Brain abscess is a collection of pus that develops in the brain due to an infection. Causes of this disease are infections in other parts of the body or improper functioning of immune system.
Treatment for this are antibiotics and close monitoring. In some cases, the abscess has to be removed surgically.
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What is a community of interacting organisms and their environment called?
Answer:
Ecosystem
Explanation:
Ecosystem refers to the interaction between the community of organisms within their external environment. Ecosystems can be of different sizes and can be marine, aquatic, or terrestrial.
Answer: It is called a Ecosystem
Explanation: Definiton: a biological community of interacting organisms and their physical environment.
Which diagnostic test measures the level of oxygen and carbon dioxide in the blood?.
As a teenager, whenever you have gone out with friends or traveled away from home, you've likely been asked to call and check in every once in a while. Most of us probably don't think much about doing so. We may even talk on the phone with friends or family members several times a day. But pretend for a moment that you are a soldier in the military. You have been sent overseas for several months, away from all of your family and friends, in order to serve your country. You might imagine that the ability to call home and talk with your loved ones would be something to look forward to. But what if those phone calls left you with a $7,600 phone bill? When 14-year-old Brittany Bergquist and her 12-year-old brother Robbie, of Norwell, Massachusetts, saw a news story about a soldier who found himself with just this problem, they decided to help. Robbie recalls, "We were taken aback and wanted to make sure he didn't have to pay that cell phone bill!" They began by raising money. Brittany and Robbie donated 14 dollars of their own savings and collected seven dollars from friends. A local bank heard about what they were doing and donated $500. But $521 was nowhere near the amount needed to help the soldier pay his bill. So Brittany decided to send donated cell phones to the soldiers. This way, they would have their own phone to use when calling home, which would be less expensive. Brittany and Robbie collected as many old cell phones as they could. But there was a problem. Because of security concerns, the Pentagon would not allow phones to be sent overseas. Brittany and Robbie were determined, so they came up with another idea. They found a cell phone recycler in Michigan who would pay them five dollars for each phone they sent in to be recycled. Using that money, they could buy pre-paid phone cards to send to the troops.It didn't take long for the Cell Phones for Soldiers program to take off. Today, there are over seven thousand locations to drop off your old cell phone. The program has recycled over ten million phones since it was started in 2004. Over 180 million minutes of talk time have been given to the soldiers, and each week, about twelve thousand calling cards are sent. The Bergquist family still runs the program largely on their own. Brittany says that her involvement with the charity has helped her learn how to build awareness for a cause, and form relationships with companies that can help. Although she admits that she gets nervous when she has to do something that is out of her comfort zone, she has learned that it is important to overcome her fear so that her charity can continue to grow. She says founding Cell Phones for Soldiers "... has been the most positive and motivating experience of my life..." and that, "It's unbelievable and overwhelming to know that we've been able to help out families that we're never going to see; that we've had an impact on their lives."
please compare and contrast it thanks
The office would have no cell phones policy for employees to increase the concentration during the working hours and increase the productivity of work.
What is no cell phone policy?No cell phone policy has been the policy in which the use of the cell phone has been strictly prohibited and it has been implemented in the offices or working place to increase the productivity and concentration in the workings hours.
Excessive use of cell phone at the work can be reduced the quality of work because while using phone brain stops to generate the good ideas and limit yourself.
During working hours the mobile devices are could to be in the desk and advised not to keep the mobile phone in the hand or nearby working table. Cell phone policies has been a set of the guidelines regarding the use of the cellphone in the workplace. The employees of that workplace should be read cell phone policies before joining.
Therefore, The office would have no cell phones policy for employees to increase the concentration during the working hours and increase the productivity of work.
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does light need matter to travel
Answer:
Light travels as a wave. But unlike sound waves or water waves, it does not need any matter or material to carry its energy along. This means that light can travel through a vacuum—a completely airless space.
Briefly explain the effects of various pollutants (acid rain, plastics, oil, or fertilizers) on the four spheres – you should be
able to discuss specific effects on terrestrial and aquatic ecosystems.
The plastic particles they consume enter the food chain through the various life forms in these habitats, all the way up to us humans.
What effect of pollutants on terrestrial and aquatic sphere?Aquatic life forms mostly suffer as a result of water pollution because water bodies lose an adequate amount of fresh dissolved oxygen due to an increase in toxicity.
Contaminants like sulfur can cause excessive acidity in lakes and streams, harm to trees and forest soils, and limit the biodiversity of plant communities.
Therefore, various effect of pollutant on terrestrial and aquatic ecosystems.
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in humans, 2–3 percent of body protein is broken down and rebuilt every day, during which some of the building blocks for protein are lost. humans therefore need to frequently replenish their supply of carbon by absorbing co2 from the air. retain all the nitrogen-15 contained in their food need to eat food rich in fatty acids to rebuild their proteins. use food as a source of amino acids. make all of their required amino acids from the fatty acids stored in their liver.
In humans, 2–3 percent of body protein is broken down and rebuilt every day, during which some of the building blocks for protein are lost. humans, therefore, use food as a source of amino acids.
The body is made up of protein, which may be found in almost every organ, tissue, and body part, including muscle, bone, skin, and hair. It contributes to the production of hemoglobin, which transports oxygen in the blood, and enzymes, which drive numerous chemical reactions. You are made up of at least 10,000 distinct proteins, which also keep you that way.
Protein is present in every human cell. An amino acid chain makes up the basic building block of proteins. In order for your body to repair damaged cells and create new ones, you need protein in your diet. Children, teenagers, and expectant women all need protein for healthy growth and development.
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Questions on The excretory system
True urine on a cold day is usually darker.
False a person is more likely to urinate on a cold day
False, adh triggers reabsorption of water in the collecting ducts
True at the convoluted tubules certain substances are selectively reabsorbed into the blood stream via diffusion
are the answers for the mentioned questions on The excretory system .
What are excretory systems used for?Removing waste from the body is the excretory system's job. These wastes include heat, salts, CO2, nitrogen, and water. The body's process of transforming food into energy is called metabolism. There are waste products as a result of metabolism.
The human excretory system is made up of the following organs: one urethra, one urine bladder, two kidneys shaped like beans, and two ureters.
Excretion is the process through which waste products from the body's typical biological functions are eliminated. It's important to get rid of waste materials like carbon dioxide. If they are allowed to build up, they harm people and slow down important chemical processes.
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Once a cell completes mitosis, molecular division triggers must be turned off. What happens to mpf during mitosis?.
Once a cell completes mitosis molecular division triggers must be turned off and after the mitosis is completed MPF is deactivated.
What is mitosis and why MPF is deactivated after the mitosis?Mitosis is the cell multiplication with thousands of functions in normal physiology also , to heal the would etc.Mitosis do not divide the cell instead the cell gets divided into meiosis that is the cell division phase.There are four to five phases of both mitosis and meiosis amongst which is a phase called anaphase supposed to be the shortest phase.During the phase MPF is activated that is during the anaphase, and it activates another protein complex.Hence once a cell completes mitosis molecular division triggers must be turned off and the MPF is deactivated.To know more about mitosis visit:
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6. explain the functions of the following structures or molecules in the respiratory system: structure function alveoli bronchus diaphragm hemoglobin bicarbonate ions trachea
The function of the following structures 1)alveoli 2) bronchus 3)diaphragm 4)hemoglobin 5) bicarbonate ions 6)trachea in the respiratory system are as given below.
Alveoli: These are tiny air sacs in our lungs where the exchange of gases take place. Alveoli move oxygen and carbon dioxide into and out of our bloodstream during respiration. When we breathe in, Oxygen from the air is passed into the bloodstream through the capillaries on the alveoli walls. During exhalation, the carbon dioxide in the blood is passed into the alveoli which are breathed out.
Bronchus: The primary function of the bronchus is to help in the passage of air we breathed in from the trachea(windpipe) to the bronchioles in the lung. The exhaled air carrying carbon dioxide also passes out through the bronchi.
Diaphragm: the diaphragm helps pull or expel air into and out of the lungs. When we inhale the diaphragm flattens and contracts. This creates a vacuum that helps to pull air into the lungs. When we exhale the diaphragm relaxes and this pushes the air out of our lungs.
Hemoglobin: Hemoglobin is a protein found in blood and its main function is to transport oxygen from our lungs to the tissues of our body where it releases this oxygen.
Bicarbonate ions: CO[tex]_{2}[/tex] or carbon dioxide formed as a waste product in our body is removed from our body as bicarbonate ions which are formed when carbon dioxide is hydrated (reacts with H[tex]_{2}[/tex]0). The bicarbonate ion is then carried to the lungs where it dehydrates. This produces CO[tex]_{2}[/tex] and this is released when we exhale.
CO[tex]_{2}[/tex] + H[tex]_{2}[/tex]O ⇄ HCO[tex]_{3} ^{-}[/tex] (bicarbonate ion) + [tex]H^{+}[/tex]
Trachea: the function of the trachea is to carry air into and out of the two bronchi which lead to the lungs.
Diagram of respiratory system is attached.
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Select the type of inheritance pattern that is best described below:
In rabbits, an allele for full color ( C ) is dominant over an allele for chinchilla (c’) color. Both full color and chinchilla are dominant over the white allele ( c ). A rabbit can be CC, Cc’, Cc, c’c’, c’c, or cc.
a. Codominance
b. Incomplete Dominance
c. Multiple Alleles
d. Pleiotropy
e. Polygenic Inheritance
We can see that the rabbit from the description shows the pattern called multiple alleles.
What are alleles?According to Mendel genetics, we know that the factor that determines the inheritance pattern of an organism is called the gene. The genes re located in the chromosomes. It is common to find out that it is not a single gene that controls the inheritance of a given trait.
Now we can see that a rabbit can be CC, Cc’, Cc, c’c’, c’c, or cc. This implies that more than on allele does control the expressed trait and this is an example of multiple allele.
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What are the four major categories of organic compounds?
a
point)
с
acids, bases, nucleic acids, and polysaccharides
carbohydrates, lipids, nucleic acids, and proteins
carbon, hydrogen, nitrogen, and oxygen
all of the above
Answer:carbohydrates, lipids, proteins, and nucleotides.
Explanation:
The human stomach is an organ that helps us digest food. The stomach is one of many organs involved in the process of digestion. Others include the esophagus, small intestine, pancreas, and gall bladder. What name is given to a set of organs that work together to perform a specific function?.
Answer:
Organ System
Explanation:
A group of organs that work together to perform a specific function is called an organ system.
Answer:
organ systems
Explanation:
because they have different ways in digesting food and when they've been brought to work together they help your body to function
What is an example of how gender ideology is often reflected in gender stereotypes?.
Descriptions of the roles of egg and sperm in college biology textbooks published during the early 1990s
What are gender stereotypes?
A gender stereotype is a preconceived notion about the features or characteristics that women and men possess or should possess or the roles that women and men should or should not do. Positive and negative gender stereotypes exist, such as "women are nurturing" and "women are weak."
Hence, descriptions of the roles of egg and sperm in biology textbooks are an example of how gender ideology is often reflected in gender stereotypes.
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Describe how a substrate interacts with an enzyme. Use the phrase lock and key in your description. Answer in 2-3 sentences.
A substrate interacts with an enzyme to generate an enzyme-substrate conformational change that resembles a key capable of matching to a particular lock in a door.
What is enzyme specificity?Enzyme specificity refers to the ability of an e3znyme to bind to a particular substrate in order to catalyze a chemical reaction. This binding lead to the formation of the enzyme-substrate complex where the substrate matches with the enzyme at the active site in a similar way to a lock and a key.
Therefore, with this data, we can see that enzyme and substrate are very specific and they interact in a similar way to a key and a lock in the door.
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Describe one source of genetic variation in meiosis and explain, in your own words, how it increases genetic variation.
One source of genetic variation in meiosis is Recombination or crossing over.
A zygote is formed when one gamete from each parent combines fertilization. In meiosis, each gamete has a unique set of DNA because of recombination and independent selection. The resulting zygote is a one-of-a-kind creation as a result of recombination.
In prophase I, homologous chromosomes, one from each parent, pair along their lengths, gene by gene, resulting in recombination or crossing over. Chromosomes break and then rejoin, exchanging some of their genes. The combination of genes on the chromosomes is now novel.
During meiosis, the process of chromosomes moving at random to separate poles is called an independent assortment. After meiosis, a gamete will have 23 chromosomes, but independent assortment means that each gamete will have one of many different chromosome combinations.
This rearranging of genes into one-of-a-kind combinations raises a population's genetic variation and explains the variation between siblings with the same parents.
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Question
What is the atomic number of an atom?
Responses
the number of electrons and neutrons
the number of electrons and neutrons,
the number of neutrons
the number of neutrons,
the number protons and neutrons
the number protons and neutrons,
the number of protons
According to the research, the correct option is the number of protons. The atomic number of an atom is the number of protons.
What is the atomic number?It is a number that indicates the amount of protons that allows the ordering of the various chemical elements in the periodic table.
In this sense, it is responsible for defining the electronic configuration of the atom since it represents the protons that are present in the nucleus of an atom.
Therefore, we can conclude that the atomic number represents the positive nuclear charge of an element (protons) and is associated with the nucleus.
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Answer:
The number of neutrons
Explanation:
took the test
In a eukaryotic cell, secreted proteins and integral plasma membrane proteins are synthesized by___.
In a eukaryotic cell, secreted proteins and integral plasma membrane proteins are synthesized by ribosomes docked to the rough ER.
A Eukaryotic Cell is what?
Large and sophisticated creatures are made up of eukaryotic cells, which have a nucleus surrounded by a nuclear membrane. Eukaryotic cells are found in fungi, plants, mammals, and protozoa. They are categorized as belonging to the Eukaryota kingdom.
They can sustain diverse conditions within a single cell, enabling them to perform numerous metabolic processes. They are able to grow several times larger than prokaryotic cells because of this.
Eukaryotic Cell Characteristics
The following are the characteristics of eukaryotic cells:
The nuclear membrane encloses the nucleus in eukaryotic cells.
the mitochondria of the cell.
In a eukaryotic cell, the locomotory organs are flagella and cilia.
The outermost layer of eukaryotic cells is called a cell wall.
The process of mitosis is how cells divide.
The cytoskeleton is present in eukaryotic cells.
All of the genetic information is contained in a single, linear DNA found in the nucleus.
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