The accumulation of amino acids and sugars in animal cells can occur through
A. ATP pumps.
B. sodium-potassium pumps.
C. glucose pumps.
D. coupled transport.
E. proton pumps.
D. coupled transport.
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Conifers produce copious amounts of pollen during reproduction. What would be a likely consequence of a significant reduction in the amount of pollen produced by conifers?
A. There would be little effect because coevolved pollinators would still be able to transfer pollen from the male cones to the appropriate female cones. B. There would be a significant negative effect on the viability of seeds because double fertilization could not occur, so there would be no food available for the growing embryo. C. There would be a decrease in the number of seeds produced because the chances of pollen reaching a female cone of the same species would be reduced. D. There would be a significant decrease in the genetic diversity of embryos, but little effect on the number of seeds as only one pollen grain is necessary to fertilize a single female cone.
The presence of hydrochloric acid in the stomach serves to ____
a. inactivate pepsinogen
b. digest fats c. activate amylase d. kill bacteria e. emulsify proteins
In the figure above, which number identifies the location where the Organ of Corti might be found?
a. 2 b. 4 c. 6 d. 8 e. 10
Familial hypercholesterolemia affects approximately what paercentage of individuals?
a. 1/500 b. 1/5 c. 1/50 d. 1/1,000 e. 2/100