Scientists have found that carrying sickle-cell anemia (meaning, one is heterozygous) protects an individual from:
a. chicken pox
b. malaria
c. pneumonia
d. common cold
b
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Agricultural populations may be more vulnerable to infectious disease due to their __________
a. higher population density, sedentary lifestyle, and limited access to clean water b. increased interaction with groups of migrants c. inability to rapidly respond and move during a disease outbreak d. lower population density, mobile lifestyle, and limited access to clean water
What factor has been discovered by Elman Service to explain bilocal residence?
A) a drastic loss of population because of infectious disease B) population increase due to increased health care delivery since WWII C) an indifference to social change by the married couple D) a complete breakdown of social customs
Two important distinguishing features found among most primates are an opposable thumb and the presence of sensitive pads on the tips of the digits
Indicate whether the statement is true or false.
Graphic representations of evolutionary relationships among animal species are called:
A. karyotypes B. allopatric trees C. phylogenetic trees D. none of these