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Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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![Over time, Lizard tails have become shorter than the longest tail but longer than the shortest tail, this represents
1. Stabilizing Selection
2. Disruptive Selection
3. Directional Selection
4. Phenotype Selection
5. All of the above](https://content.bartleby.com/qna-images/question/55356234-b4ff-460e-96b6-1dcda6b55e45/6d583fb9-d146-4ebf-a087-fe7f61f733f1/037ha6_thumbnail.png)
Transcribed Image Text:Over time, Lizard tails have become shorter than the longest tail but longer than the shortest tail, this represents
1. Stabilizing Selection
2. Disruptive Selection
3. Directional Selection
4. Phenotype Selection
5. All of the above
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- In 1959 Daniel Yuh set up a long-term study of cataloging the blood types of a group of foragers in the Brazilian rainforest. In 1959 he found there were no individuals with blood type B. Three generations later, after this group had begun exchanging mating partners with another group, there were several members with blood type B. A-mutation B-natural selection C-gene flow D-genetic driftarrow_forwardWhat is an adaptation? (select all that apply) The only means of natural selection. A trait that gives an organism a reproductive advantage in its current environment OA trait that gives rise to a new species An individual's attempt to conform to its environment A property that occurs at the population level.arrow_forwardWhich of these is NOT an assumption made by HWE? Group of answer choices Mating is random No adaptation Infinitely large population No natural selection No mutationarrow_forward
- Which of the following types of selection maintain variation in a population? a. Overdominance (Heterozygote advantage) b. Underdominance (Heterozygote disadvantage) c. Frequency-dependent selection d. Directional selection e. Both a. & b. f. Both a. and c. g. Both a. and d.arrow_forwardIn a population of frogs, individuals with green coloration are camouflaged on leaves and are less likely to be eaten by predators. However, as the number of green frogs increases, predators learn to search for them more effectively, making it advantageous to be a less common color. What type of selection is occurring in this scenario? Disruptive selection 8888 Positive frequency-dependent selection Stabilizing selection Negative frequency-dependent selection Directional selectionarrow_forwardSelect all that are TRUE regarding the Hardy Weinberg Law. 1.It predicts the allele frequencies in the next generation 2.The dominant allele frequency is denoted as p 3.The genotype frequencies must add to 1 4.It assumes that natural selection is not influencing the population 5.The assumptions of the law are rarely met in natural populationsarrow_forward
- Which of the following is NOT true of stabilising selection a. it occurs when inidivuals with extreme trait values have lower fitness than those with intermediate trait values. b. it keeps the mean close (or moves it closer) to the optimum value c. it can result from opposing directional selection, such as when early flowering makes flowers susceptible to herbivores, but late flowering reduces the availability of pollinators. d. it does not improve the fitness of the population to the environment. e. it decreases the range of variation in the populationarrow_forwardThinking about Natural Selection and Adaption, what if instead the predators were 4 different spoons: ¼ teaspoon, 1 teaspoon, 1 tablespoon, and 1 large serving spoon? Then what if each time beans (the prey) were captured, they had to be immediately emptied into a narrow-necked jar (with an opening about the size of 1 teaspoon)? What do you think the outcome of the experiment might be in this new situation? (Which “predator” will be the most successful, which the next most, etc. down to the least successful, and why?) Be sure to explain your reasoningarrow_forwardHELP WITH THIS QUESTIONarrow_forward
- 1. What is the function of melanin in humans? What is the function of melanin in other species? 2. According to the film, why is there a lack of diversity in the MC1R allele among African populations? 3. According to the film, why was dark skin selected for regions close to the equator? 4. Describe the selective pressure favoring light skin in regions far from the equator. 5. Which human populations living in which environments are most at risk for rickets today and why?arrow_forwardTwo males are fighting for territory that will increase the probability of mating success. Which term best describes this activity? O Intrasexual selection Intersexual selection Artificial selection O Mutationarrow_forwardWhich of the following are accurate descriptions of natural selection? Select all that apply. •It selects for traits that increased the complexity of the organism . ���It creates genetic variation. •It creates physical variation. •It selects for traits that helps organisms reproduce most successfully.arrow_forward
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