Chewing is important because it
A. alters the food chemically.
B. adds enzymes that cause starch, proteins, and fats to begin to be broken down.
C. increases the surface area exposed to the action of enzymes.
D. is required by your mother.
C. increases the surface area exposed to the action of enzymes.
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If a gene expresses itself, but not equally in all individuals that have it, there is a difference in
A. expressivity. B. penetrance. C. dominance. D. acquired traits.
Some plants can tolerate flooding conditions by
A. forming additional adventitious roots. B. formation of aerenchyma. C. shedding their bark. D. pumping water out of their roots. E. opening their lenticels.
The cell walls of some ________ are composed of minerals such as calcium carbonate
A) archaea B) bacteria C) algae D) fungi E) bacteria and fungi
When species evolve in different directions from a common point, it is called ______________.
A. Convergent evolution B. Divergent evolution C. Mutation D. Vicariance E. Natural selection