What type of curve is depicted in a graph of the relationship between the size of a region and the biodiversity that it can support?
A) habitat loss
B) biomass
C) overexploitation
D) species-area
D
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Why is it that there is less variation among individuals in any one non-African population than among individuals in the contemporary African population?
A. Because the individuals that left Africa were a relatively small sample of the total amount of variation present. B. Because the individuals that left Africa exhibited a greater number of mutations than the African population. C. Because the African population was larger than the populations that left, they had more mutation. D. There is no reason because the above statement is incorrect.
Which of the following are physical stimuli that influence plant responses?
A. Rocks, light, touch, music. B. Water, gravity, temperature, soil minerals, microorganisms. C. Wind, temperature, fungi. D. CO2, light, water vapor, gravity. E. Touch, gravity, herbivores, pathogens.
The minimum number of microbes required for infection to proceed is termed a/an ________.
A. indigenous biota B. infectious dose C. virulence factor D. minimal dose E. endotoxin
Familial hypercholesterolemia affects approximately what paercentage of individuals?
a. 1/500 b. 1/5 c. 1/50 d. 1/1,000 e. 2/100