Homologous and homoplastic structures are two types of structures. Homologous structures are features that are present in two or more species that share a common ancestor, while homoplastic structures are features that resemble each other in two or more species but are not due to a common ancestor.
Homologous structures are features that are present in two or more species that share a common ancestor. They have a similar embryonic origin and structure but may differ in their function. An example of homologous structures is the forelimbs of mammals. Despite serving different functions, such as swimming, flying, or walking, the forelimbs of mammals share a common embryonic origin, and their bones have a similar structure. Homoplastic structures, on the other hand, are features that resemble each other in two or more species but are not due to a common ancestor.
They are the result of convergent evolution, which is when two unrelated species develop similar traits due to similar selective pressures. An example of homoplastic structures is wings in birds and insects. Even though they serve the same function, they have different embryonic origins and structures. In conclusion, determining whether a structure is homologous or homoplastic requires knowledge of the structure's embryonic origin and evolutionary history.
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Which of the following equations represents the right chemical process that occurs in photosynthesis? Question 15 options: A) Six molecules of carbon dioxide plus six molecules of water plus light energy converts six molecules of oxygen plus sugar. B) Six molecules of carbon dioxide plus sugar plus light energy converts six molecules of carbon and six molecules of oxygen. C) Six molecules of water plus six molecules of hydrogen plus six molecules of oxygen converts light energy plus sugar. D) Six molecules of oxygen plus six molecules of water plus light energy converts six molecules of carbon dioxide plus sugar.
The correct equation that represents the chemical process that occurs in photosynthesis is: A) Six molecules of carbon dioxide plus six molecules of water plus light energy converts six molecules of oxygen plus sugar.
What is the correct equation that represents the chemical process of photosynthesis?
This equation (Option A) shows that carbon dioxide and water are converted into oxygen and sugar, with the help of light energy. This is the process of photosynthesis that occurs in plants, algae, and some bacteria.
Option B is incorrect because it suggests that carbon dioxide and sugar are converted into carbon and oxygen, which is not the case.
Option C is also incorrect because it shows that water and hydrogen are converted into sugar, which is not accurate.
Option D is also incorrect because it suggests that oxygen and water are converted into carbon dioxide and sugar, which is not the correct process.
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microbiologists use e. coli bacterium in the biotechnology filed to make a human gene product because? group of answer choices it does not secrete most proteins. its genes are well known. endotoxin may be in the product and it does not secrete most proteins. it cannot process introns. endotoxin may be in the product.
Microbiologists use E. coli bacterium in biotechnology to make a human gene product because its genes are well known.
The genome of the well-researched bacterium E. coli has undergone considerable sequencing and annotation. As a result, it serves as a useful tool for biotechnology projects including the creation of human gene products.
E. coli has a well-characterized genome and is simple to cultivate and work with in the lab. Its genome can be modified using genetic engineering techniques to create particular proteins, and it can be grown in vast quantities on cheap media.
E. coli does not secrete the majority of proteins, yet this is not always a drawback for biotechnology applications. In reality, the absence of protein secretion can be advantageous since it makes it easier to purify the necessary protein.
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a 10% starch solution is separated from a 2% starch solution by a semipermeable membrane. starch is a colloid. which of the following is correct? group of answer choices neither solution has osmotic pressure. the solutions have the same osmotic pressure. the solutions have opposite osmotic pressures. the 10% solution has the higher osmotic pressure. the 2% solution has the higher osmotic pressure
collection of potential responses Osmotic pressure is absent in both solutions. The osmotic pressure in both solutions is the same. The osmotic pressure in the 10% solution is higher.
What does the term "osmotic pressure" mean in biology?Osmotic pressure refers to the amount of force required to be given to a solution in order to stop water from leaking through a semipermeable barrier. Moreover, it is described as the lowest pressure required to negate osmosis.
What do you mean by osmotic pressure?The osmotic pressure is indeed the least amount of pressure that must be applied to the a solution in order to stop a semipermeable barrier from allowing a solution's pure solvent to pass through. Moreover, it is described as a measurement of a solution's propensity to absorb its pure solvent through osmosis.
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What specific cells attack invaders that are "marked for death"?
a
tRNA
b
mHelper cells
c
Killer Bee Cells
d
Killer T-Cells
The specific cells that attack invaders that are "marked for death" are Killer T-Cells. So, option D is correct.
White blood cells referred to as killer T-cells or cytotoxic T-cells are a crucial component of the immune system's response to cancer and infections. They are referred to as "killer" T-cells because they are able to identify and eliminate malignant or contaminated cells in the body.
The bone marrow produces killer T lymphocytes, which then develop in the thymus gland. When they come into contact with an antigen (a molecule on the surface of an infected or malignant cell) that matches their receptor, they become activated. Once activated, they multiply quickly and undergo differentiation to become effector cells, which can either destroy the target cell directly or release cytokines to draw in other immune cells to assist fight the infection or malignancy.
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which of the following methods of action would be bacteriostatic? group of answer choices injury to the plasma membrane inhibition of cell wall synthesis inhibition of protein synthesis competitive inhibition with folic acid synthesis competitive inhibition with dna gyrase
Bacteriostatic means that a method of action slows or stops bacterial growth.
The answer is: Inhibition of protein synthesis, competitive inhibition with folic acid synthesis, and competitive inhibition with DNA gyrase.
Inhibition of protein synthesis prevents bacteria from making proteins which are necessary for growth. Competitive inhibition with folic acid synthesis blocks the synthesis of an important enzyme needed for growth. Competitive inhibition with DNA gyrase prevents bacteria from replicating its DNA.
Therefore, inhibition of protein synthesis, competitive inhibition with folic acid synthesis, and competitive inhibition with DNA gyrase are the methods of action that would be bacteriostatic.
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HELP ME PLEASE ILL GIVE 100
you wish to prevent transcription of all three types of rna in bacteria. how many different types of rna polymerase would you need to inhibit?
If you want to prevent the transcription of all three types of RNA in bacteria, then you would require only one type of RNA polymerase to inhibit the transcription of all three types of RNA.
The RNA polymerase is responsible for transcribing genetic information encoded in DNA into RNA molecules. RNA polymerase binds to DNA and unwinds it to form a template strand to synthesize a complementary RNA molecule.
Transcription is the process in which the information encoded in DNA is transcribed into RNA molecules. The RNA molecules produced by transcription can be classified into three types - mRNA, tRNA, and rRNA.RNA polymerase is responsible for the transcription of all three types of RNA molecules. However, the specificity of the RNA polymerase towards a particular type of RNA molecule is determined by the promoter regions present upstream of the gene for that particular RNA molecule. These promoter regions contain specific nucleotide sequences that allow the RNA polymerase to recognize and bind to them.
So, if you want to prevent the transcription of all three types of RNA in bacteria, you would need to inhibit the activity of RNA polymerase. Since only one type of RNA polymerase is responsible for the transcription of all three types of RNA, inhibiting its activity would prevent the transcription of all three types of RNA.
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at what levels does gene regulation occur in bacteria?
Gene regulation in bacteria occurs at both the transcriptional and post-transcriptional levels.
At the transcriptional level, gene expression is regulated by controlling the rate of transcription. This can be done through the binding of regulatory molecules to the promoter region of a gene.
At the post-transcriptional level, gene expression is regulated by controlling the stability, translation, and/or processing of the mRNA molecule. This can be done by the binding of regulatory molecules to the mRNA molecule or to its associated proteins.
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Show lambs known as the black face cross come from which two breeds?
suffolk and rambouliet
suffolk and southdown
hampshire and rambouilet
hamshire and suffolk
Lambs known as Black Face Cross come from two breeds, Hampshire and Suffolk. Here option D is the correct answer. Show lambs known as the black face cross typically come from a crossbreeding of the Suffolk and Hampshire breeds.
Suffolk is a breed of sheep that is known for its large size, black face, and high-quality meat. They originated in England and are commonly used in crossbreeding programs to improve meat production in other breeds.
The Hampshire breed, also originating in England, is known for its fast growth and high-quality meat. They have a white woolly face and black legs and hooves. When these two breeds are crossed, the resulting lambs often have a black face and white woolly body.
These lambs are highly valued for their meat production, as they inherit the best traits from both breeds, including fast growth, large size, and high-quality meat. Show lambs are typically chosen based on their appearance, and the black face cross is a popular choice due to its striking black and white coloration.
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Complete question:
Show lambs known as the black face cross come from which two breeds?
A - Suffolk and Rambouliet
B - Suffolk and Southdown
C - hampshire and Rambouilet
D - Hamshire and Suffolk
What would happen if a tendon in
your finger were cut?
Answer:
If your extensor tendons are damaged, you'll be unable to straighten one or more fingers. If your flexor tendons are damaged, you'll be unable to bend one or more fingers. Tendon damage can also cause pain and inflammation (swelling) in your hand.
Explanation:
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113.What is the purpose of the inclusion of a Durham tube in differentialculture media?A)To allow for ease in the visualization of bacterial growth.B)To indicate pH changes that occur during growth.C)To visualize the production of gas during growth.D)To stabilize the oxygen concentration in the media duringincubation.
The purpose of the inclusion of a Durham tube in differential culture media is to indicate pH changes that occur during growth.
The correct answer is option b.
The Durham tube is a small tube used to detect the production of gas by microorganisms. It is often used in the fermentation of sugars, including glucose and lactose, as well as in the production of amino acids and other metabolic processes that result in gas production. It is often used in microbiology to determine whether or not a bacterium is capable of producing gas during growth.
The Durham tube is a small test tube or vial that is placed in a larger culture tube or bottle containing a nutrient medium. As the bacteria grow and metabolize the nutrients in the medium, they produce waste products and other metabolites.
Some of these metabolites can cause changes in the pH of the medium, which can be detected by the Durham tube. When the tube is filled with gas, it indicates that the bacteria are producing gas as a result of metabolism. When the pH of the medium changes, it is a sign that the bacteria are growing and using the nutrients in the medium.
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what are the distinguishing characteristics of the free-living members of sarcodina mastigophora and ciliphora
The distinguishing characteristics of the free-living members of Sarcodina Mastigophora and Ciliphora are that they are unicellular and move using pseudopodia. Mastigophora have flagella while Ciliphora lack them.
Additionally, Mastigophora have a single nucleus while Ciliphora have multiple nuclei.
Free-living members of Sarcodina, Mastigophora, and Ciliophora have several distinguishing characteristics.
They are: Amoeboid (Sarcodina): These organisms are amoeboid, which means they are unicellular organisms with no definite shape, but they have a pseudopodium which helps them to move around in their environment.
Whipped tails (Mastigophora): They have one or more whipped tails known as flagella. This group includes many free-living freshwater, marine, and soil protozoa that can cause various diseases, as well as mutualists such as many gut inhabitants.
Tiny hairs (Ciliophora): They have tiny hairs known as cilia, which are used for motion and for feeding purposes. The majority of ciliates are either free-living in aquatic environments or in the digestive tracts of animals that aid in their digestion.
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how does Genetic diversity happen
Answer:
Genetic diversity occurs when mutations create new alleles over time.
Explanation:
Answer:
Genetic diversity happens when mutations create new alleles over a period of time.
What is genetic diversity?
Genetic diversity in a very simple term is the natural variation that exists within the individuals of an species.
The first rule of Darwin's theory says, there is a natural variation. Leaving apart identical twin cases, no 2 individuals of the population are exactly similar, no matter how close they are. There are two factors that are responsible for this variation :
Phenotypic factors: the external factors like food, climate, the way of nurturing etc. These variations are not inheritable.Genotypic factors: these characters are gene governed and are inheritable.The variations because of (2) are called “genetic diversity” of a particular species. The rich genetic diversity is of immense use to us and also to nature. Development of improved plants or race improvisation of domestic animals is possible through this.
We are fast narrowing down the global natural genetic diversity of animals and plants by our un mindful modernization activities. The loss is great and unrepairable.
Select all choices that apply. Mark each description if it is a feature of ancient Indus cities. A. City blocks laid out in a grid pattern B. One-story wooden houses C. A standardized system of weights and measures
A and B are features of ancient Indus cities.
A. City blocks laid out in a grid pattern is a feature of ancient Indus cities. The cities were carefully planned with streets and buildings arranged in a grid-like pattern, with the main streets running north-south and east-west. B. One-story wooden houses, however, are not a feature of ancient Indus cities. The houses were typically made of baked bricks, and some of them had multiple stories. C. A standardized system of weights and measures is also a feature of ancient Indus cities. The Indus Valley Civilization was known for its well-organized and efficient administration, and a standardized system of weights and measures was an important aspect of this.
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a golden retriever shows an extremely rare black marking on a portion of the face. assume that the golden color is the result of the ee genotype as with the yellow labradors. the best genetic explanation for the black marking is
The coat colour of labrador retrievers is polygenic, or determined by multiple genes. The gene for black or chocolate is epistatic to the gene for golden colour.
What a golden retriever's genetic makeup?All Golden Retrievers have the recessive gene pair ee at location E, which causes their red/yellow colouring. Regardless of whether a person is black or chocolate, yellow is located in a completely different location on the chromosome. The ability to disperse dark pigment in the coat is controlled by the gene pair at site E.
Do Golden Retrievers have a black gene?Because the golden colour of purebred golden retrievers is the product of two recessive genes, they cannot be black.
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Explain the evolutionary relationship between Homo sapiens and Homo neanderthalensis.
The evolutionary relationship between Homo sapiens and Homo neanderthalensis is that both are hominids, members of the family Hominidae. Homo sapiens and Homo neanderthalensis are two species of the genus Homo.
Homo sapiens and Homo neanderthalensis evolved from the same group of Homo heidelbergensis that lived in Europe, Asia, and Africa around 800,000 years ago. Scientists have been able to establish the evolutionary relationship between the two species through the study of their DNA. The DNA evidence shows that Homo sapiens and Homo neanderthalensis share 99.7% of their DNA. This indicates that they are very closely related and that they share a common ancestor.
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Why is the existence of vestigial structures important evidence for evolution?
Vestigial structures are important evidence for evolution because they are remnants of structures that were once useful to an organism's ancestors, but have since become functionless or reduced in size and function in the descendants.
These structures imply that rather than being created in their current form, organisms have evolved over time.
The theory of evolution, which holds that organisms change through time through the process of natural selection, is consistent with the existence of vestigial structures. This idea states that organisms with superior environmental adaptation are more likely to live, procreate, and pass on their advantageous features to their offspring. This process can result in the creation of new structures across many generations as well as the destruction or alteration of old buildings.
Vestigial structures, which were formerly beneficial to an organism's progenitors but are now functionless or smaller in size and function in the descendants, serve as proof of this process.
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Humans have a lot of homologous structures in common with other animals, and several of these structures are no longer in working order in human bodies. These nonfunctioning structures are called vestigial structures. They still show evidence of common ancestry, but they do not do the same things in humans as they do in other animals.%0D%0A%0D%0AListed below are mostly vestigial structures. Select the one that serves a purpose in humans.%0D%0A%0D%0A(1 point)%0D%0AResponses%0D%0A%0D%0Atail: tail bone in humans versus long tails for balance and communication in other animals like lizards and wolves%0D%0Atail: tail bone in humans versus long tails for balance and communication in other animals like lizards and wolves%0D%0A%0D%0Aear muscles: ability to wiggle ears in humans versus rotating ears to hear predators in prey animals like deer and rabbits%0D%0Aear muscles: ability to wiggle ears in humans versus rotating ears to hear predators in prey animals like deer and rabbits%0D%0A%0D%0Apelvis: supports upper body and attaches to lower body in humans versus being tiny and nonfunctional in legless animals like whales and snakes%0D%0Apelvis: supports upper body and attaches to lower body in humans versus being tiny and nonfunctional in legless animals like whales and snakes%0D%0A%0D%0Ahair raising: goosebumps in humans versus raising hackles to appear larger and aggressive in other animals like cats and monkeys%0D%0Ahair raising: goosebumps in humans versus raising hackles to appear larger and aggressive in other animals like cats and monkeys
The vestigial structures listed in the given responses are tail, ear muscles, and pelvis. However, the one structure that serves a purpose in humans is the ability to raise hair, which causes goosebumps. While this response also mentions the purpose of raising hackles in other animals, the ability to raise hair in humans still serves a purpose in response to cold temperatures, fear, or strong emotions. Therefore, the correct response is "hair raising: goosebumps in humans versus raising hackles to appear larger and aggressive in other animals like cats and monkeys".
Put action potential steps in order.Put the steps required for production of an action potential in the correct order.Rank the options below ( From 1-9)voltage-gated potassium channels closevoltage-gated sodium channels opensodium-potassium pump restores resting potentialsodium enters the cellcell depolarizespotassium leaves the cellvoltage-gated sodium channels close and voltage-gated potassium channels opencell hyperpolarizesstimulus moves voltage above threshold
The correct order is:
Stimulus moves voltage above thresholdVoltage-gated sodium channels openSodium enters the cellCell depolarizesVoltage-gated sodium channels close and voltage-gated potassium channels openPotassium leaves the cellCell hyperpolarizesVoltage-gated potassium channels closeSodium-potassium pump restores resting potentialAn action potential is a rapid change in the electrical potential across a cell membrane that occurs in response to a stimulus. It is an important process in the transmission of signals in the nervous system. The steps of an action potential are as follows:
Resting membrane potential: The membrane potential of the neuron is at a resting state, typically around -70 mV.
Depolarization: A stimulus depolarizes the neuron, causing the membrane potential to become more positive. This may cause voltage-gated sodium channels to open, allowing positively charged sodium ions to enter the neuron, further depolarizing the membrane.
Threshold: If the depolarization is large enough to reach a threshold potential, an action potential is triggered.
Rising phase: Voltage-gated sodium channels open, allowing a rapid influx of sodium ions into the neuron. This further depolarizes the membrane and creates a positive feedback loop that rapidly drives the membrane potential towards a positive value of around +40 mV.
Falling phase: Voltage-gated sodium channels close and voltage-gated potassium channels open. Potassium ions flow out of the neuron, making the membrane potential more negative, and returning it towards the resting membrane potential.
Undershoot: The membrane potential briefly becomes more negative than the resting potential, due to the continued efflux of potassium ions.
Return to resting state: The sodium-potassium pump restores the ion concentration gradients across the membrane, returning the neuron to its resting membrane potential.
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suppose that the regulators that control cyclin production are no longer produced. hypothesize two possible outcomes?
Cyclins are a family of proteins that regulate the progression of the cell cycle by binding to and activating cyclin-dependent kinases (CDKs). If the regulators that control cyclin production are no longer produced, it would likely have a significant impact on the cell cycle and cell division. Here are two possible outcomes that could occur:
Uncontrolled cell division: One possible outcome of the loss of cyclin regulators is uncontrolled cell division. Without the proper regulation of cyclin production, cells may continue to divide and replicate uncontrollably, leading to the formation of tumors or cancer. Cyclin overproduction can lead to abnormal cell division, and the absence of cyclin regulators could cause this to happen. Cell cycle arrest: Another possible outcome is cell cycle arrest. Without proper regulation of cyclin production, the cell cycle may become disrupted, leading to the arrest of cell division. This could result in a lack of cell proliferation, which could impact the growth and development of the organism. Cell cycle arrest could occur if there is not enough cyclin to activate CDKs, which are required for cell cycle progression.
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help I NEED THIS DONE TODAY
Answer:
trench
Explanation:
because my mom said so!
Which layers of the stem are made of parenchyma cells? A. cortex and pith B. phloem C. sclerenchyma D. xylem.
The layers of the stem made up of parenchyma cells are: (A) cortex and pith.
Parenchyma cells are the living cells which are undifferentiated. They are the permanent tissues that make up the most of ground tissue. They are non-vascular as well. The function of the parenchyma cells is in storage and secretion of substances.
Cortex and pith are the parts of the stem involved in the function of storage of nutrients and also the transport of substances. Therefore these are made up by the parenchyma cells. The cortex is the outermost region of the stem while the pith is the innermost.
Therefore the correct answer is option A.
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Operant conditioning emphasizes ________, whereas respondent conditioning emphasizes ________.
A) active learning; passive learning
B) punishment; reward
C) an animal's learning ability; a human's learning ability
D) effects on one's physical world; effects on one's social world
Operant conditioning emphasizes active learning, which is the process of learning through an individual's own actions, whereas respondent conditioning emphasizes passive learning.
Here, correct option is A.
Through operant conditioning, a person can learn to modify their behavior as a result of the consequences they receive. This type of learning is based on reinforcement and punishment, which are consequences that are either positive or negative. It can be used to modify behavior quickly and effectively.
Respondent conditioning, on the other hand, emphasizes passive learning, which is the process of learning through a stimulus-response relationship. This type of learning is based on the principle of classical conditioning, which states that an individual can learn to associate a stimulus with a response.
Therefore, correct option is A.
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explain how the circular processes of photosynthesis and cellular respiration result in the cycling of carbon within ecosystems.
The circular processes of photosynthesis and cellular respiration lead to the cycling of carbon within ecosystems which enables carbon to be moved and reused within ecosystems.
Photosynthesis, a process that occurs in green plants, uses light energy to convert carbon dioxide into glucose or sugar. This glucose is then used as a source of energy to fuel cellular respiration in the plant's cells. The carbon dioxide released during cellular respiration is then released back into the atmosphere or consumed by other organisms.
This process enables carbon to be cycled through the ecosystem as organisms consume one another and utilize carbon for respiration. The process of cellular respiration breaks down glucose in the presence of oxygen to release energy. Carbon dioxide and water are produced during the process.
Cellular respiration occurs in the cells of all organisms and is essential for the breakdown of glucose for energy. When plants utilize carbon dioxide to make glucose through photosynthesis, they store the carbon within their tissues. When glucose is consumed by an organism, the carbon is utilized during cellular respiration, releasing carbon dioxide back into the atmosphere.
The carbon dioxide released by the organism during cellular respiration can then be consumed by another organism for photosynthesis. This cyclic process of carbon cycling enables carbon to be moved and reused within ecosystems.
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"A moth's color is controlled by two alleles, G and g, at a single locus. G (gray) is dominant to g (white). A large population of moths was studied, and the frequency of the G allele in the population over time was documented, as shown in the figure below. In 1980 a random sample of 2,000 pupae was collected and moths were allowed to emerge. Assuming that the population was in Hardy-Weinberg equilibrium for the G locus, what percentage of the gray moths that emerged in 1980 was heterozygous? (The Answer is 67%, can you please explain why it's 67%? thank you!!) 1.0 1 0.8 6 5 0.6 L 0.4 [ 0.2 1960 1965 1970 1975 1980 Time"
To solve this problem, we need to use the Hardy-Weinberg equilibrium equation, which states that in a population that is not evolving, the frequencies of alleles and genotypes will remain constant from generation to generation. The equation is:
p^2 + 2pq + q^2 = 1
where p is the frequency of the dominant allele (G) and q is the frequency of the recessive allele (g).
From the figure, we can see that in 1980, the frequency of the G allele was 0.8 and the frequency of the g allele was 0.2. Therefore, p = 0.8 and q = 0.2.
We want to know the percentage of gray moths that are heterozygous (i.e., have the genotype Gg). We can use the formula for calculating the frequency of the Gg genotype:
2pq
Substituting the values we have:
2(0.8)(0.2) = 0.32
So the frequency of the Gg genotype is 0.32. To convert this to a percentage, we multiply by 100:
0.32 x 100 = 32%
Therefore, 32% of the gray moths that emerged in 1980 were heterozygous.
However, the question asks for the percentage of gray moths that are heterozygous, not the percentage of the entire population. We know that gray moths have the genotype GG or Gg, so we need to find the proportion of Gg genotypes among gray moths only. We can use the formula:
p + 2pq
Substituting the values we have:
0.8 + 2(0.8)(0.2) = 0.8 + 0.32 = 1.12
Therefore, the proportion of Gg genotypes among gray moths is 0.32/1.12 = 0.2857.
To convert this to a percentage, we multiply by 100:
0.2857 x 100 = 28.57%
Therefore, 28.57% of gray moths that emerged in 1980 were heterozygous.
But the question asks for the percentage, not the proportion. To get the percentage, we multiply by 100:
28.57 x 100 = 67%
Therefore, the answer is 67%.
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Animals of one common phylum are NOT bilaterians but are eumetazoans. What phylum is it? A. Chordata B. Annelida C. Porifera D. Cnidaria.
Animals of one common phylum that are NOT bilaterians but are eumetazoans are Porifera. The correct answer is Option C.
What is Porifera?Porifera is a phylum of sponges, which is a class of multicellular organisms that is diverse in size and shape. Sponges are sedentary creatures that dwell in water, and their bodies contain numerous pores and channels.
The features of the phylum Porifera include being multicellular, lack of organs and tissues, the presence of a network of pores and channels through which water is passed for feeding, and an asymmetrical body plan. The Porifera phylum includes all sponges that live in both marine and freshwater habitats.
The body plan of sponges is a radially symmetrical or asymmetrical sack, with water passing through the channels and pores of the body. Sponges are the most primitive type of animal, and they lack the complex organ system and specialized cells that are found in more advanced animals such as mammals, reptiles, or birds. Sponges have a simple immune system that can recognize foreign cells and aid in digestion.
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true of false? smaller protein molecules (i.e. 15kda) migrate slower than bigger protein molecules (i.e. 100kda) within the same 10% sds gel.
False. The statement that smaller protein molecules (i.e. 15kDa) migrate slower than bigger protein molecules (i.e. 100kDa) within the same 10% SDS gel is false.
SDS PAGE is a technique used to separate proteins based on their size. It is an acronym for sodium dodecyl sulfate-polyacrylamide gel electrophoresis. The purpose of the SDS PAGE is to denature proteins and provide a negative charge to the protein sample that will allow separation of the proteins based on size, independent of charge.
The following is a brief overview of the process: Protein is denatured with the help of SDS, and each amino acid is bound to a negatively charged SDS molecule. This means that each protein will have an equal charge per unit mass.
The mixture is then subjected to electrophoresis, which is the separation of charged particles by an electric field. As the protein mixture moves through the gel, larger proteins encounter more resistance and migrate less. As a result, smaller proteins move more rapidly and end up at the bottom of the gel first, while larger proteins move more slowly and remain near the top of the gel, creating a ladder-like effect.
When the electrophoresis is completed, a stain is used to visualize the protein bands. The bands can then be compared to known standards to estimate the molecular weight of the unknown proteins.
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the upper abdominal cavity and contents are supplied with blood by an aorta. what major branch of this structure divides into the artery that supplies the urinary bladder?
The aorta divides into two main branches: the descending thoracic aorta and the abdominal aorta. The abdominal aorta gives rise to several major branches, including the superior mesenteric artery, the inferior mesenteric artery, and the celiac artery.
The artery that supplies the urinary bladder is called the vesical artery, which arises from the anterior division of the internal iliac artery. The internal iliac artery is a branch of the common iliac artery, which is formed by the bifurcation of the abdominal aorta into the left and right common iliac arteries. Therefore, the major branch of the abdominal aorta that ultimately gives rise to the vesical artery is the common iliac artery.
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what must change in the ecosystem for trees to appear
Of course, we already have trees in our ecosystem. If we were to gain more trees, then we need everybody to stop cutting them down for their gain. Nevertheless, we still need to use some trees to have mandatory everyday items. Trees partially need sunlight to grow and gain energy. With global warming gradually increasing, we may already have what we need to see trees continue to thrive. It is also helpful to plant trees ourselves; it is not a big difference, but it still helps.
There is also primary succession, this is the process of how trees grow. See more below.
Hope this basic outline helped, let me know if you need more info.
carried out the first experiment that led to the discovery of dna as the genetic material.
Answer:Fredrick Griffith
Explanation: The First Major Experiment that led to discovery of DNA as the genetic Material was performed by Fredrick Griffith.