Two species of lizards differ in the rate of aging, with one species aging much more slowly than the other. Considering
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Two species of lizards differ in the rate of aging, with one species aging much more slowly than the other. Considering
In pipefish, males have a pouch that is used to carry developing embryos donated by a female. One of the genes known to play a major role in the formation of the pouch is also found in other fish, but it is involved in function of the endocrine system. This is consistent with: (a) co-option (b) irreducible complexity (c) group selection (d) tradeoffs
Which of the following would increase the equilibrium frequency of an allele maintained by mutation selection balance: O(a) Lower mutation rate O (b) The allele is highly advantageous O (c) Weaker purifying selection O (d) The allele is highly deleterious
Some plant species have mechanisms to prevent selfing (mating with itself). It works like this: a pollen grain with an A allele cannot fertilize a female that also has the A allele. While this prevents selfing, it also has the detrimental effect of preventing mating with all other plants in a population that have the same allele. Matings between plants with different alleles are fertile. Imagine a population where the A allele is at a frequency of 0.95 and the B allele is at a frequency of 0.05. Based on this alone, plants with allele would have higher fitness due to O (a) A; stabilizing selection O (b) B; stabilizing selection O (c) B; disruptive selection O (d) A; overdominance O(e) B; negative frequency dependent selection