A transport system in which transport of an ion in one direction provides the energy for active
transport in the opposite direction is known as ____.
a. antiport
b. active diffusion
c. symport
d. cotransport
e. osmosis
A
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In humans, the surface area of the small intestine is
A. 3 square centimeters. B. 3 square meters. C. 300 square meters. D. 3,000 square meters. E. 300,000 square meters.
Generally, the energy for pumping protons outside of a plant cell comes most directly from
a. sunlight. b. starch. c. ATP. d. diffusion. e. glucose.
A population is experiencing ____ if the allele
frequency remains stable.
a. genetic imbalance b. genetic equilibrium c. random mutations d. controlled mutations e. random change
Four of the five choices listed below are accepted as
valid explanations of genetic behavior. Select the exception. a. blending b. dominance c. segregation d. independent assortment e. probability