Our knowledge of existing species is limited and
biased toward __________. Fill in the blank(s) with the appropriate word(s).
Answer: vertebrates
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You are given an embryo with eight cells and you carefully separate them and allow them to develop in separate containers. Each of the cells forms a complete embryo that develops normally into an adult animal. How would you categorize your animal?
A. It has indeterminate cleavage. B. It has determinate cleavage. C. It is a protostome. D. It is an annelid, mollusk, or arthropod. E. It has spiral cleavage.
Strong selection against the phenotypes for both homozygotes
a. reduces the equilibrium frequencies of the homozygous genotypes b. completely eliminates the homozygous genotypes c. has no effect on the homozygous genotypes
During breeding season, one should expect female house finches to prefer to mate with males with the brightest red feathers. Which of the following is true of this situation?
A) Alleles that promote more efficient acquisition of carotenoid-containing foods by males should increase over the course of generations. B) Alleles that promote more effective deposition of carotenoid pigments in the feathers of males should increase over the course of generations. C) There should be directional selection for bright red feathers in males. D) All three of these. E) Only B and C.
Two types of vaccines for polio have been developed, an inactivated whole (Salk) and a live attenuated (Sabin) vaccine. Compare and contrast the advantages and disadvantages of the two polio vaccines
What will be an ideal response?