Please answer all the questions and double check your answers to
get a thumbs up.
1) The best and most convincing scientific proof that
two species are close evolutionary relatives is that:
a. their embryos follow the same developmental stages
b. they evolved in similar habitats
c. they share a number of analogous structures
d. nucleotide sequences from their DNA closely match
2) Despite the fact that human toes/fingers appear quite
different from horse’s hooves, both structures possess the same
bones and bone structure. In humans, natural selection
favored separated, elongated dexterous fingers tipped with
individual protective nails. In the horse, selection
pressures favored a strong, blunt, fused hoof covered with a single
protective nail. This is an example of
:
a. analogous evolution
b. homologous evolution
c. convergent evolution
d. founders effect
3) The fossil evidence indicates that the opossum has
shown no significant genetic change in the past several hundred
thousand years, suggesting that the opossum
species:
a. has very little genetic diversity
b. is very close to genetic equilibrium
c. is poorly represented in the geological record
d. is on the verge of becoming extinct
4) If an organ or structure is no longer useful it will
regress and be minimally expressed in the gene
pool. Such structures are said to be:
a. homologous b. analogous c. vestigial d. analogous
5) A remote island is populated by one species of
iguana, all the direct descendants of a single pregnant
female washed ashore on drift wood after a
hurricane. Which of the following best describes
this island population?
a. species diversity is higher in the island community than in
the mainland community
b. genetic bottleneck results in a decline in species diversity
in the island community
c. no genetic drift occurs in the island community
d. the island population will quickly reach a state of genetic
equilibrium
Please answer all the questions and double check your answers to get a thumbs up. 1) The best and most convincing scient
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