Answer:
c. contaminated food and water
Explanation:
Bacteria that has contaminated with food or toxins causing diarrhoea, nausea and abdominal pain.
which of the following senses converts the presence of dissolved chemicals into a graded membrane potential?
Taste, Hearing, and Vision senses convert the presence of dissolved chemicals into a graded membrane potential. Thus the correct answers are options (A,B,C).
To produce or stimulate the perception of taste, a substance in the mouth interacts chemically with taste receptor cells on taste buds in the oral cavity, typically on the tongue. Taste, olfaction, and trigeminal nerve stimulation all contribute to determining the flavors of foods and other substances (which registers texture, pain, and temperature). Humans have taste receptors in a number of locations, including the epiglottis and upper surface of the tongue. The gustatory cortex is in charge of flavor perception.
The complete question is:
Which of the following senses converts the presence of dissolved chemicals into a graded membrane potential?
Select one:
a. Hearing
b. Taste
c. Vision
d. Smell
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In sheep, white wool is the dominant to black wool. If 25% of the sheep in a large population have black wool, calculate the following frequencies. Assume the population is in HW equilibrium.
a. The frequency of true-breeding white sheep.
b. The frequency of heterozygous sheep with white coats.
c. The frequencies of white and black sheep.
d. The number of white and black sheep you would expect to find in a population of 750.
If 25% of the sheep in a large population have black wool, the frequencies are:
a. The frequency of true-breeding white sheep is 75%.
b. The frequency of heterozygous sheep with white coats is 25%.
c. The frequencies of white and black sheep are 75% and 25%, respectively.
d. The number of white and black sheep you would expect to find in a population of 750 is 562.5 white sheep and 187.5 black sheep.
What is frequency?
In biology, frequency is a measure of how often a particular event or outcome occurs within a certain population or sample. For example, the frequency of a certain gene in a population can be determined by counting how many individuals in the population possess the gene.
What is a Gene?
A gene is a unit of genetic information that contains the instructions for making a specific protein or molecule. Genes are made up of DNA and are located on chromosomes within the nucleus of cells. Genes control the biological characteristics that are passed down from generation to generation and can be altered by mutations.
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Answer to these required:
The words that fill in the blanks in order are;
1) Micro organisms
2) Penicillium
3) Cellulose
4) Energy
5) Glycogen
6) Bimetallic strip
7) Increases
8) Insulators
9) Spectrum
10) Different
What is light?Light is the kind of energy that is able to produce a sensation that is seen by our optical eyes. White light is composed of many colors. The colors that make up white light is called the spectrum of white light. There are seven colors that can be found in the spectrum of white ight.
The speed of light is not the same in every substances. We know that light is the wave that travels the fastest. The speed of light in air is popularly quoted as 3 * 10^8 m/s.
Heat is the form of energy that leads to a chang in the temperature of an object. When we heat the bimetalllic strip of a thermostat then it would expand unevenly.
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Atmospheric
pressure is also known as barometric pressure because it
is measured using a barometer. A rising barometer indicates increasing
atmospheric pressure and a falling barometer indicates decreasing
atmospheric pressure.
HOW DOES THIS FACT FROM MY SUB QUESTION ANSWER THAT COMES FROM A ARTICLE RELATE TO MY RESEARCH QUESTION WHICH IS
What effect does the amount of air pressure have on how far a soccer ball travels when kicked?
pressure is also known as barometric pressure because it
is measured using a barometer. A rising barometer indicates increasing
atmospheric pressure and a falling barometer indicates decreasing
atmospheric pressure.
HOW DOES THIS FACT FROM MY SUB QUESTION ANSWER THAT COMES FROM A ARTICLE RELATE TO MY RESEARCH QUESTION WHICH IS
What effect does the amount of air pressure have on how far a soccer ball travels when kicked?
which model represents the general structure of a highly branched carbohydrate?
Answer:the answer is C
Explanation:
C model represents the general structure of a highly branched carbohydrate. So, the correct option is (C).
What is Carbohydrate?The word 'carbohydrate' is derived from a French word 'hydrate de carbon' meaning 'hydrate of carbon' where this class of organic compounds have their general formula [tex]C_n(H_2O)_n.[/tex]
Carbohydrates are defined as macronutrients which are one of the three main ways our body gets its energy. These are called carbohydrates because they contain carbon, hydrogen and oxygen at the chemical level. These essential nutrients include sugars, fibers and starches found in grains, vegetables, fruits and milk and other dairy products. Carbohydrates are the basic food group that play an important role in healthy living.
There are three types of Carbohydrates which are:
Starches which is also known as complex carbohydratesSugarsFiberThus, C model represents the general structure of a highly branched carbohydrate. So, the correct option is (C).
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Match the connective tissue component of a nerve with its description.
a) Binds fascicles to form a nerve
b) Surrounds groups of axons to form fascicles
c) Surrounds each axon
a) Epineurium
b) Perineurium
c) Endoneurium
The connective tissue for the given component of a nerve along with description is as follows: a). Binds fascicles to form a nerve is c) Endoneurium, b) Surrounds groups of axons to form fascicles is b) Perineurium, c) Surrounds each axon is c) Endoneurium.
a). The connective tissue that encircles each muscle fiber, called the endomysium, binds fascicles together to form a nerve (cell). A fascicle is formed when the perimysium encircles a collection of muscle fibers. All of the fascicles are encircled by the epimysium to create a complete muscle.
b). Forms fascicles by enclosing collections of axons: A nerve fascicle is encased in a protective sheath called the perineurium. This groups axons that are directed toward the same anatomical region. Fibroblasts are the main component of the perineurium.
C). Surrounds each axon: A thin endoneurium layer covers each axon. The fibers are bound together into bundles known as fascicles by the tough layer of connective tissue termed perineurium. All of the fascicles that make up the nerve are enclosed in a strong fibrous sheath called the epineurium.
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Correct Question:
Match the connective tissue component of a nerve with its description.
a) Binds fascicles to form a nerve a) Epineurium
b) Surrounds groups of axons to form fascicles b) Perineurium
c) Surrounds each axon c) Endoneurium
Imagine a population of beetles. Yellow beetles are easier for birds to see and eat. Gray beetles blend into their surroundings, so they are less visible to birds than yellow beetles are. As a result, gray beetles are more likely to survive and reproduce, enabling the gene for gray coloration to be passed on to the next generation. This increases the frequency of genes for gray coloration in the population. Which of the following evolutionary processes does this scenario describe?
genetic drift
mutation
migration
natural selection
This situation is described by evolutionary processes of natural selection.
What different evolutionary processes are there?These include natural selection, non-random mating, gene flow, genetic drift, and mutation. The impact each mode of evolution has on fitness, adaptation, the typical phenotype of a characteristic in a population, and population genetic diversity can be used to describe each mechanism.
Which four evolutionary processes are there?The relative significance of various selective and stochastic mechanisms for polymorphism within and among communities is unknown, despite the fact that many studies give examples of natural changes such adaptive evolution, balance selection, detrimental variation, and genetic drift.
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Match the following major signs and/or symptoms with a particular source of a food-borne or water-borne illness. Nausea; muscle pain; fatigue; facial swelling, especially around eyes Norovirus Clostridium botulinum Campylobacter jejuni Abdominal cramps, diarrhea (can be bloody), fever, and vomiting Stomach flu Blurry vision, difficulty swallowing, and general muscle weakness Sore throat and violent coughing Giardia Trichinella "Explosive" vomiting and watery, non bloody diarrhea Diarrhea, abdominal pain, weight loss Frequent urination
The nurse may identify these as dysphagia symptoms if a patient develops nausea, vomiting, abdominal pain, diarrhea, and lightheadedness after meals following gastric bypass surgery.
The term "dysphagia" refers to a medical disorder where a person may experience swallowing issues, leading to a variety of symptoms like nausea, vomiting, stomach cramping, etc. after meals.Because health issues are linked to difficulties moving both food and liquids from the mouth to the stomach, the individual's health symptoms may also manifest while they are drinking (rather than only when they are eating).With this information, we can see that the dysphagia condition is linked to swallowing issues in a person or patient, and as a result, the above-mentioned list of frequent symptoms can be used to characterize this sort of disease.
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the various energy systems provide atp at different rates. arrange the energy systems based on how quickly they produce atp, from fastest to slowest.
The fastest and least complex energy system used to produce ATP is creatine phosphate.
The energy used and stored by cells is derived from adenosine triphosphate (ATP). Adenine, a ribose sugar, and three serially linked phosphate groups make up the nucleoside triphosphate (nucleoside) structure of ATP.
Phosphagen, glycolytic, and mitochondrial respiration are the three energy mechanisms that work to refuel ATP in muscle. The maximum rate of ATP regeneration, the capacity of ATP regeneration, the substrates employed, and the products produced by the three systems vary, as do the ways in which they each contribute to tiredness.
All energy systems strive to produce ATP or molecules that will support ATP creation, as well as to deal with the heat and hydrogen that are produced as a result of these processes. There are three energy systems: the glycolytic system, the oxidative system, and the system that uses immediate energy.
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The layers of the eye are the ___________. (SELECT ALL THAT APPLY) A.Sclera B.Retina C.Choroid
The layers of the eye are the sclera, retina and choroid.
The outer layer of the eyeball is called as sclera (the white of the eye).
The middle layer is the choroid.
The inner layer is the retina, which lines the back two-thirds of the eyeball.
Now let us understand all three layers of eye, one by one:
The outer layer
The outer layer consists of the sclera (the white of the eye) and the cornea (the dome structure at the front of the eye). The voice is like a window in the eye. It lies in front of the iris which is the colored part of the eye. The iris works like the shutter of a camera, adjusting the amount of light entering the eye by changing its size, depending on the light.
The Middle Layer
The middle layer of the eye is called Choroid which is a layer containing blood vessels that lines the back of the eye and is between the retina (the inner light layer) and the sclera (outer eye wall).
Inner layer
The inner lining of the eye, or retina, is like the film in a camera. It receives light from the image we are looking at, and converts this light into impulses that are sent through the fibers of the optic nerve to the brain.
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One advantage of primary research is that it avoids needless duplication of costly research efforts.
Indicate whether the statement is true or false
One advantage of primary research is that it avoids needless duplication of costly research efforts: statement is false.
What are the advantages of primary research?Primary research is a practise that researchers employ to gather data directly as opposed to relying on data from earlier study. They "own" the data in theory. Primary research is only done to solve a specific issue that needs in-depth investigation.
Primary research ensures that the data gathered is current and pertinent, allowing precise patterns to be shown. Additionally, primary research gives the individual or organisation access to the information.
Primary research often costs more, takes longer, but produces more definitive results than secondary research. Research that has previously been prepared, gathered, arranged, and published by others is known as secondary research.
So, the given statement is false.
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For example, when the body is infected with a disease, white blood cells of the immune system will express genes that produce antibodies. Injuries, such as cuts around wounds, will initiate the expression of genes in the cells of the injured tissues for clotting factors. Temperature even determines male or female differentiation an some organisms. In certain species of alligators, eggs incubated at temperatures below 30°C will typically develop into females, while eggs incubated above 34°C will typically develop into males,
TDQ7: There are 3 roles of cellular division that are essential to organisms. You need to know them and be able to explain them. Explain why each role is essential for life?
1. Allows for growth of the organism.
2. Allows for cell differentiation.
3. Replaces dead cells.
Because it is constant and independent of the other variables, the incubator is the independent variable.
A variable that can be affected by the other variables is known as an independent variable. The fact that this kind of variable is independent means that it never changes. Due to its changing behaviours, the temperature is the dependent variable in this experiment, but the incubator is the independent variable because of its constant behaviours.The offspring's gender is a dependent variable because it is influenced by the incubation temperature. Environmental factors, such as food, water, and environmental conditions, among others, may be controlled variables.Therefore, since the incubator does not vary and is independent of the other component, we can draw the conclusion that it is the independent variable.
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Whether an animal excretes ammonia, uric acid, or urea has mostly to do withWhich follow statements about the pephron is false?
Availability of water in its niche, dietary strategies, metabolic costs statements about the pephron is false.
What is the main cause of uric acid?Your body converts purines, which are substances that are naturally found there, into uric acid. Purines are also found in several foods, including red meat and organ meats as liver. Seafood that is rich in purines includes prawns, herring, oysters, crabs, trout, and tuna.
What does a high uric acid level mean?If there is too much uric acid in the body, a condition called hyperuricemia will manifest. Gout may lead to monosodium urate crystals, also known as uriate crystals. The buildup of these crystals inside the joints can cause gout, a severe form of arthritis. Additionally, they could get stuck there and form kidney stones.
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06.02 mc)replication is a process that synthesizes a new strand of complementary dna. which of thefollowing statements is true about replication origins?
In both prokaryotes and eukaryotes, replication proceeds in both directions from each origin,The two strands of NA at the origin are separated, allowing the formation of a replication bubble and
Bacterial chromosomes have a single origin, but eukaryotic chromosomes have many origins these three statement are true for replication.
Eukaryotic chromosomes have several replication origins, whereas prokaryotic chromosomes only have one.
Prokaryotes don't have as many replication sources as eukaryotes do.
DNA is found in bacteria as a protracted loop that is floating in the cytoplasm of the cell.
The DNA in eukaryotic cells is linear, housed in chromosomes, and safeguarded inside the cell nucleus.
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Complete question : Replication is a process that synthesizes a new strand of complementary DNA. Which of the following statements is true about replication origins?
a. In both prokaryotes and eukaryotes, replication proceeds in both directions from each origin.
b. The two strands of NA at the origin are separated, allowing the formation of a replication bubble.
c. Eukaryotic chromosomes have a single origin, but bacterial chromosomes have many origins,
d. Bacterial chromosomes have a single origin, but eukaryotic chromosomes have many origins
one way an epsp (excitatory postsynaptic potential) could facilitate depolarization of the postsynaptic membrane is___
By allowing positively charged ions to enter the postsynaptic cell through ion channels opened by the depolarization of the postsynaptic membrane. This influx of ions causes the membrane potential to become more positive, thus resulting in further depolarization.
An EPSP (Excitatory Postsynaptic Potential) is a type of nerve impulse that is generated when an excitatory neurotransmitter is released from the presynaptic terminal of a neuron. This neurotransmitter binds to an enzyme (usually acetylcholine-receptor) on the postsynaptic membrane, causing the postsynaptic membrane to become depolarized (less negative).
Step 1: An action potential is generated in the presynaptic neuron, which causes the vesicles containing neurotransmitters to release glutamate into the synaptic cleft.
Step 2: The glutamate binds to the postsynaptic membrane, specifically to the glutamate-receptors (usually AMPA receptors).
Step 3: The binding of the glutamate to the receptor causes an influx of positively charged ions (such as sodium ions) into the postsynaptic cell, leading to a depolarization of the postsynaptic membrane.
Step 4: The depolarization of the postsynaptic membrane causes a change in the membrane potential of the postsynaptic cell, leading to an EPSP.
Step 5: The EPSP depolarizes the postsynaptic membrane further and can trigger an action potential in the postsynaptic neuron.
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Exhalation begins when
A. inspiratory muscles relax.
B. diaphragm contracts.
C. blood circulation is the lowest.
D. both A and B
E. all of the above
Exhalation begins when inspiratory muscles relax. Inspiratory muscles relax such as the external intercostals, exhalation will also occur.
Breathing is the term used to describe pulmonary ventilation. It involves the movement of air through the lungs as you breathe in (inhalation) and exhale (exhalation). The environment and the gases in the lungs have different pressures, which causes air to move.
The act of releasing air from the lungs during the breathing cycle is known as expiration (exhalation). Expiration causes the diaphragm to relax and tissues to rebound elastically, which reduces the thoracic volume and raises interalveolar pressure. The act of exhaling forces air out of the lungs.
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the plasma membrane is an outer boundary that separates the interior of a cell from its external environment and is found in all cells. the molecules that make up the plasma membrane have a unique quality that helps to ensure the integrity of the cell. considering the structure of the plasma membrane, which of the statements best explains why human cells do not dissolve in water?
The fatty acid tail regions of the phospholipids of the plasma membrane repel water.
The cell membrane (also known as the plasma membrane (PM), cytoplasmic membrane, or plasmalemma) is a biological membrane that separates and protects the interior of all cells from the outside environment (the extracellular space). The cell membrane is a lipid bilayer composed of two layers of phospholipids with cholesterols (a lipid component) interspersed between them, which maintains appropriate membrane fluidity at different temperatures.
Membranes also contain membrane proteins, which include integral proteins that span the membrane and act as membrane transporters, as well as peripheral proteins that loosely attach to the cell membrane's outer (peripheral) side and act as enzymes to facilitate interaction with the cell's environment.
The cell membrane, ions the movement of ions the movement of ions the movement of ions the movement of ions the movement of ions the movement of ions the selectivelymph. In addition, cell membranes are involved in a variety of cellular processes such as cell adhesion, ion conductivity, and cell signalling and serve as the attachment surface for several extracellular structures, including the cell wall and the carbohydrate layer called the glycocalyx, as well as the intracellular network of protein fibers called the cytoskeleton. Cell membranes can be artificially reassembled in the field of synthetic biology.
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A biology student is reading research articles about the effects of various feedback mechanisms on the human body. Based on commonly accepted scientific theories and models, Which of the following is an example of a correct prediction of a positive regulatory feedback mechanism?
a. The circulatory system responds to an elevated blood pressure, reflexively causing the heart rate to decrease.
b. The digestive system normally secretes the inactive enzyme pepsinogen. When a person eats, the pepsinogen is converted into the digestive enzyme pepsin.
c. The respiratory system sends nerve impulses to increase breathing rate during periods of high stress, which can produce additional stress due to a feeling of loss of breath.
d. The endocrine system measures the level of blood testosterone. High levels of the hormone will signal the hypothalamus to stop the production of other hormones like GnRH and LH.
An example of a correct prediction of a positive regulatory feedback mechanism is option b.
What is positive regulatory feedback mechanism in body?
Positive regulatory feedback mechanism is a type of feedback loop in the body which occurs when the output of a process stimulates the same process to further increase the output. For example, during exercise, the body produces adrenaline which stimulates the heart to beat faster and also increases the production of adrenaline. This creates a positive feedback loop, as the increased adrenaline stimulates the heart to beat faster, which in turn increases the production of adrenaline. This mechanism ensures that the body continues to produce the necessary hormones and other substances to sustain the activity. In other words, positive regulatory feedback mechanism is the body's way of ensuring that the body maintains its equilibrium and is able to carry out its activities without any disruption.
The chemical pepsin is used by the stomach to digest proteins. It starts by secreting an enzyme called pepsinogen, which is inactive. When food is consumed and the body needs to digest it, pepsinogen is converted into pepsin. The process of turning more pepsinogen molecules inside the stomach into pepsin triggers a positive feedback loop, allowing the stomach to produce enough of the protease to break down proteins.
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which of the steps of the scientific method is being used in the following example? if the water temperature changes, it will affect the amount of fish eaten by a tiger shark.
The hypothesis used is that legumes can grow anywhere if the scientific method is applied. Hypothesis implementation and data collection: Four bean plants are planted in the same pot on the same soil.
The first step in the scientific method is to ask the question you want to answer. This question contains one of the important starters. how, what, when, why, where, who, and what.
A hypothesis is an educated guess about what will happen during an experiment. Hypotheses are often written with the words "IF" and "THEN". For example, "If you don't study, you won't pass the exam." The "if" and "then" statements reflect independent and dependent variables.
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Australopithecines have been found mainly in two African regions. These areas exhibit unique geological conditions that have allowed fossils to be preserved for millions of years. Drag the appropriate site type to the location in Africa where it is foundSouth Africa - limestone caves - Au. africanus and Au. robustus have been found in multiple South African locations. Eastern Africa - sedimentary basins and river drainage systems - Many australopithecine fossils have been found in the Great Rift Valley, including the famous Au. afarensis.
Au. africanus and Au. robustus has been discovered in a number of South African limestone caverns. Eastern Africa: Sedimentary basins and river drainage systems. The Great Rift Valley is home to numerous australopithecine fossils, including the renowned Au. afarensis.
The most well-known Australopithecus fossil discoveries in East and South Africa are probably "Lucy" and "Mrs Ples." As opposed to what some have previously claimed, Australopithecus fossils from the richest hominin-bearing stratum (Member 4) at Sterkfontein in South Africa are much older and are contemporaneous with Australopithecus afarensis in East Africa. Afarensis exhibited traits common to both apes and humans. These traits included apelike face proportions (a flat nose, a prominently projecting lower jaw), a small braincase (often less than 500 cubic centimetres, or about 1/3 the size of a modern human brain), and long, powerful arms with curved fingers.
Thus, we can state that a number of South African limestone caverns have been found to contain the Au. robustus and Au. africanus. Sedimentary basins and river drainage networks in Eastern Africa. Numerous australopithecine fossils, including the well-known Au. afarensis, may be found in the Great Rift Valley.
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when a nucleotide is added to a growing nucleic acid strand during dna replication, the incoming monomer is and the energy required to drive the polymerization is derived from . please choose the correct answer from the following choices, and then select the submit answer button. answer choices a nucleoside triphosphate; dna polymerase an rna primer; cleaving a pyrophosphate dna; rna a nucleoside monophosphate; cleaving atp a nucleoside triphosphate; cleaving a pyrophosphate
When a nucleotide is added to a growing nucleic acid strand during DNA replication, the incoming monomer and the energy required to drive the polymerization are derived from the outermost 2 phosphates (pyrophosphate).
Deoxyribonucleic acid is a polymer of polynucleotide chains that coil spherically each one-of-a-kind to form a double helix. The polymer includes genetic instructions for the development, functioning, boom, and replica of all seemed organisms and lots of viruses.
In all dwelling things, DNA is vital for an inheritance, coding for proteins, and offering instructions for life and its tactics. Human cells commonly consist of 23 pairs of chromosomes, for a complete forty-six chromosomes in every cell.
Mitochondria are structures within cells that convert the power from meals right into a shape that can be used by cells.
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the membrane potential becoming more positive in value is called blank whereas, blank refers to the membrane potential becoming more negative than the resting membrane potential.
The membrane potential becoming more positive in value is called depolarization whereas, hyper-polarization refers to the membrane potential becoming more negative than the resting membrane potential.
What is membrane potential?A potential gradient known as membrane potential causes ions to passively migrate in one direction: positive ions are drawn to the "negative" side of the membrane, while negative ions are drawn to the "positive" side.
The unequal distribution of ions (charged particles) inside and outside the cell, as well as the membrane's varying permeability to various ions, influence the resting membrane potential.
The equilibrium potentials of the ions to which the membrane is permeable are represented by the membrane potential. An ion's ability to carry electricity determines how much it will affect a cell's membrane potential.
So, the membrane potential becoming more positive in value is called depolarization whereas, hyper-polarization refers to the membrane potential becoming more negative than the resting membrane potential.
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A particular species of potatoes can have red or yellow skin color. The skin color is
controlled by a single gene with two alleles, the red allele and the yellow allele. When
potatoes are homozygous for red skin color are crossed with potatoes that are homozygous
for yellow skin color, 100% of the offspring have red skin color. Based on this information,
how do the alleles for skin color interact?
* 2 point:
Answer: Red skin color is dominant, it is a simple trait controlled by one gene.
Explanation:
RR x yy = Ry, Ry, Ry, Ry
Answer:
Red skin color is dominant
Explanation:
what are enzymes for grade 8?
Answer:
Enzymes are proteins that participate in cellular metabolic processes that speed up the rate of reaction between biomolecules. Basically enzymes are proteins that catalyze reactions. Each enzyme has a specific function, and one enzyme acts on one substrate - the material that binds to the enzyme's active site. The shape of the enzyme has to match the substrate shape for the reaction to occur. How enzymes work is that they bind molecules so they are held in a geometric configuration that lets the reaction to occur.
in fruit flies red eye color (R) is dominant to white eyes (r) in a cross between two flies, 50% of the male and 50% of the female offspring had red eyes. The other half of the males and females had white eyes. What are the phenotypes, and genotypes of the parents.
The phenotype and genotype of the parents can be Rr and rr, means will have phenotype of red eye color and one with white eyes.
What is phenotype?The term "phenotype" describes a person's observable characteristics, such as height, eye colour, and blood type. Both a person's genomic make-up (genotype) and environmental circumstances affect their phenotype.
The genotype of an organism is the particular arrangement of alleles for a particular gene.
In a cross between two flies, 50% of the male and 50% of the female offspring had red eyes, demonstrating that red eyes (R) are dominant to white eyes (r), much like in fruit flies.
White eyes were present in the other half of the men and females. The parents' genotype and phenotype can be Rr and rr, which indicates that one offspring will have red eyes and the other will have white eyes.
Thus, it can be concluded that one parent will be heterozygous dominant, and one is homozygous recessive.
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Study the section of the chapter addressing with Figure. What would you expect to see in flies that lack the gene that encodes Bicoid? (Assume that Bicoid does not influence the expression of the others)
a. Stripe 2 would expand toward the tail of the embryo. b. Stripe 2 would become fainter.
c. Stripe 2 would expand toward the head of the embryo.
d. Stripe 2 would become narrower. e. All 7 stripes would disappear.
Stripe 2 would become fainter in flies that lack the gene that encodes Bicoid. Thus the correct answer is option (B).
The homeotic protein known as Bicoid is encoded by the Bicoid maternal effect gene in Drosophila. The anterior-posterior (A-P) axis is shaped during Drosophila development by a gradient in the concentration of the homeotic protein known as Bicoid. Bicoid was the first protein that was demonstrated to have morphogen-like properties. Although Bicoid is essential for Drosophila and other higher dipterans to thrive, it is absent in most other insects, where alternative genes take their place. The bicoid gene plays a crucial role in the early embryo's establishment of the head-to-tail axis. Without a bicoid, the embryo cannot form a head or a tail; instead, its body parts develop in an arbitrary order. This is due to the bicoid's role in patterning the embryo's anterior-posterior axis. To put it another way, it aids in figuring out which end of the embryo will develop into the head and which end will develop into the tail.
The complete question is:
Study the section of the chapter addressing with Figure. What would you expect to see in flies that lack the gene that encodes Bicoid? (Assume that Bicoid does not influence the expression of the others)
a. Stripe 2 would expand toward the tail of the embryo.
b. Stripe 2 would become fainter.
c. Stripe 2 would expand toward the head of the embryo.
d. Stripe 2 would become narrower.
e. All 7 stripes would disappear.
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look at the screenshot below. Thank you.
The student whose argument correctly explains what is happening in the image would be student 4. The process demonstrates how the base pairing rule is being used to build a single-strand RNA from the DNA, process 2 must demonstrate translation.
What is gene expression?Gene expression represents a series of processes through which the information present in DNA sequences is expressed as traits in living organisms.
The first step of gene expression is transcription. During this process, the coding strand of a DNA is used as a template and the information on it are converted to genetic codes in an mRNA.
The second step is translation. During this process, the genetic codes, otherwise known as codons, in the mRNA are each translated to their respective amino acids and then linked together with peptide bonds to form the primary structure of proteins.
Looking at the image, process 1 represents transcription while process 2 represents a translation.
Thus, the argument of student 4 correctly explains what is going on in the image.
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Tolman believed that rats form cognitive maps, internal representations of the layout of the world. (A) In one experiment, rats placed at the start of a maze learned to run directly to a goal box where food was provided; the purple line shows the rats' route. (B) If the preferred route was blocked, rats could easily find an effective alternative route (orange line); this indicates that they had information about the spatial layout of the maze.
Edward Tolman is the author of the phrase "cognitive map," which describes the mind's internal representation of the external environment.
He believed that people pick up a lot of signals from their surroundings and can utilize those signals to create a mental picture of their surroundings. They might reach their objective by employing this mental model of physical space to locate it among intricate environmental elements.As a result, cognitive mapping is both a type of memory and more. Memory is the process of remembering the order of the streets in the directions to your house; cognitive mapping is the process of visualising these streets as you talk. In their book "Cognitive Mapping and Spatial Behavior," Downs and Stea provide a useful definition of cognitive mapping. a method by which a person learns, encodes, stores, recalls, and decodes information about the relative placements and characteristics of occurrences in their daily spatial environment.To know more about cognitive check the below link:
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What effect does the amount of air in a basketball have on its bounce?
I NEED HELP FORMING A HYPOTHESIS
Answer:
One possible hypothesis is that the amount of air in a basketball will affect its bounce, with a basketball that is properly inflated with the correct amount of air bouncing higher and more consistently than a basketball that is either underinflated or overinflated. This is because the right amount of air in a basketball provides the optimal amount of resistance and support for the ball to bounce properly. Underinflation can cause the ball to feel too soft and may cause it to bounce erratically, while overinflation can make the ball feel too hard and may cause it to bounce less effectively. Testing this hypothesis through experiments and collecting data on the bounce height and consistency of basketballs with different levels of air pressure can provide further insight into the relationship between air pressure and a basketball's bounce.
suppose that a carrier of familial down syndrome mated with a person with a normal karyotype. which gamete from the carrier parent could fuse with a gamete from the normal parent to produce a trisomy-21 zygote? drag one of the gamete cells to the target of group 1 in the diagram. drag one of the zygote cells to the target of group 2 in the diagram.
The gamete cells in groups 1 and 2 in the diagram that have trisomy 21 are the target. Move a single zygote cells to group 2's desired location in the diagram.
How long will people with trisomy 21 live?The typical lifetime of a person having Down syndrome today is 60 years. A child with Down syndrome had a 25-year lifespan on average as late as 1983.
trisomy 21 a life-threatening condition?Up to 6,000 children are born with Down ’s syndrome every year in the U.s, where it affects 1 in 800 newborns. Approximately 85% of babies with Down syndrome are thought to survive to adulthood, and 50% of them do so for more than 50 years.
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