Traditional racial classification assumed that biological characteristics such as skin color were determined by heredity and remained stable over many generations. We now know that
A. skin color is actually determined throughout child development.
B. skin color is determined by sun exposure and the amount of melanin in our diets.
C. a biological similarity such as skin color is also the result of natural selection working among different populations that face similar environmental challenges.
D. skin color is determined by a single gene that is prone to mutations over many generations.
E. a biological similarity such as skin color is always the result of both common ancestry and natural selection.
Answer: C
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When two or more clans recognize that they share a common genealogical relationship, the more general grouping of these clans is known as a __________
A. patrilineage B. moiety C. phratry D. descent group
Which of the statements below is false regarding the relationship between malaria and the HbS allele?
a. ?The malarial parasite does not reproduce very well in the red blood cells of heterozygotes. b. ?Most people are homozygous for the HbA allele. c. ?Malaria is caused by the Plasmodium parasite. d. ?Heterozygotes have greater resistance to malaria than homozygous individuals. e. There is no geographic correlation between the distribution of the HbS allele and malaria.
At present, the members of the family hominin includes
a. apes. b. monkeys. c. all primates. d. humans. e. rats
Across many primate species grooming is used to do all of the following except:
a. create a threatening posture that will lead to aggression. b. reinforce existing social relationships. c. provide reassurance to another individual. d. comb and clean an individual's fur. e. indicate submission to another individual.