1. Carriers of the sickle-cell allele (i.e. those with a heterozygous genotype)
ID: 89042 • Letter: 1
Question
1. Carriers of the sickle-cell allele (i.e. those with a heterozygous genotype) are fittest in environments with high frequencies of:
2. Light skin is an evolutionary adaptation that evolved in our human ancestors who lived:
3. Early on in human evolution, natural selection favored dark skin closest to the equator, where sunlight and exposure to UV light is most intense.
True
False
4.
Which one of the following traits evolved first in the hominins?
5.
Scientists think the last common ancestor of African apes and humans was most likely a fully bipedal ape.
True
False
6.
Which of the following has been proposed as a possible explanation for the evolution of bipedalism?
A. Tuberculosis B. Cholera C. Malaria D. various bacterial infections E. HIV/AIDS F. Syphillis G. Small poxExplanation / Answer
1.
C. Malaria
Justification:
2.
C. in northern latitudes, and it allowed the body to absorb enough sunlight to manufacture adequate amounts of Vitamin D
3. TRUE
Justification:
4. C. bipedal locomotion
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