Although the number of melanocytes does not vary significantly from one person to another, the:
A. density of melanin varies.
B. amount of pigmentation in the skin varies.
C. ability to efficiently distribute melanin to the epidermis varies.
D. amount of melanin in the skin varies.
Answer: A
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Problems associated with the so-called thrifty-gene are associated with __________
a. HIV and AIDS b. cancer and lymphoma c. diabetes, diets of excess, and obesity d. malaria, sickle cell disease, and typhoid fever
A large earthquake in rural China killed 250,000 people, while an earthquake of similar size in California killed only 65. These comparative figures demonstrate that natural disasters can have greater or lesser effects on human life depending on ________
A) social conditions that determine who has access to houses with appropriate safety features B) whether the government is communist or democratic C) how fast people can get away during a natural disaster D) nothing in particular; the differences in mortality rates were completely random
Which of the following is an epoch of the Cenozoic era?
a. Ordovician b. Permian c. Triassic d. Cambrian e. Eocene
Hasidic families in contemporary America, who are distinguished through ethnic background and religious beliefs and practices, are considered __________
a. insignificant b. a race c. a subculture d. an ethnicity