The sodium-potassium pump of neurons pumps
A. Na+ and K+into the cell.
B. Na+ and K+ out of the cell.
C. Na+ into the cell and K+ out of the cell.
D. Na+ out of the cell and K+into the cell.
E. Na+ and K+into the cell and H+ out of the cell through an antiport mechanism.
D. Na+ out of the cell and K+into the cell.
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The equation A ? PO4 + B ? A + B ? PO4 would be catalyzed by which of the following classes of enzymes?
A) transferases B) oxidoreductases C) hydrolases D) ligases E) isomerases
Which interactions with other organisms will help to determine the carrying capacity of Earth for humans?
A. cutting of forest to increase agricultural land B. interracial mating C. human death as a result of war D. slight change in sex ratio
In fruit flies, males are determined by the presence of an X and Y chromosome; females are determined by two X chromosomes. The gene for eye color is located on the X chromosome and is absent from the Y chromosome. The allele for white eyes is recessive and the allele for red eyes is dominant. If a red-eyed male is mated with a white-eyed female, what is the probability that their male offspring will be white-eyed?
A. 100% B. 50% C. 25% D. 0%
By the process of __________, an organism's tissues store a pollutant taken up from the environment, causing the amount in the body to increase over time.
Fill in the blank(s) with the appropriate word(s).