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In which phase of the baby in utero's life is it most vulnerable to teratogens?
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- Members of two different species possess a similar-looking structure that they use in a similar fashion toperform the same function. Which information would best help distinguish between an explanation based onhomology versus one based on convergent evolution?A) The two species live at great distance from each other.B) The two species share many proteins in common, and the nucleotide sequences that code for theseproteins are almost identical.C) The sizes of the structures in adult members of both species are similar in size.D) Both species are well adapted to their particular environments.E) Both species reproduce sexually.
- The evolution of modern horses (Equus) is best described asa. the constant change and replacement of one species by another over time.b. a complex history of lineages that changed over time, with many going extinct.c. a simple history of lineages that have always resembled extant horses.d. None of the choices is correct.
- Members of two different species are never capable of mating.