Which of the following scenarios would best facilitate adaptive radiation?
A. A population of birds native to an island archipelago is forced to relocate to the mainland by a storm.
B. A population of cheetahs goes through an event in which all genetic diversity in the population is wiped out.
C. Darker-colored moths have a selective advantage over lighter-colored moths due to industrial soot on trees.
D. A population of birds becomes stranded on an island archipelago.
E. All of the above would facilitate adaptive radiation equally.
All human populations contain at least 1 mtDNA sequence of African origin. As well, relative to other contemporary populations, African populations contain the greatest amount of variation in mtDNA. Given this information about mtDNA sequences, human migration data generated from mtDNA is consistent with which of the following processes?
A. Bottleneck effect
B. Natural selection
C. Founder effect
D. Gene flow
Loss of species during background extinctions, relative to mass extinctions, is primarily due to____________.
A. natural selection.
B. genetic drift.
C. gene flow.
D. mutation.
A hypothetical island lies far from any other landmasses. There are many different types of plants, but only one animal – a beetle that can fly or walk from plant to plant and feeds by chewing leaves. Which morphological change would be most likely to trigger an adaptive radiation of the beetles?
A. A change in wing shape that improves flight speed.
B. An additional segment on a pair of legs.
C. A mouthpart that can pierce fruits and seeds.
Which of the following statements is most correct?
A. The ancestors of Homo sapiens were chimpanzees.
B. Humans and other apes represent divergent evolution from a common ancestor.
C. The evolution of upright posture and enlarged brain occurred simultaneously.
D. Humans have escaped from the affects of natural selection.
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