If an aerobic organism stopped taking in
oxygen gas, which of the following processes
would stop first?
a. the splitting of glucose into two pyruvates
b. the reduction of NAD+ to NADH
c. the release of carbon dioxide
d. electron transfer phosphorylation
e. the initiation of the Krebs Cycle
D
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In cells of human individuals with three or more X chromosomes
a. one X chromosome remains active and the rest are inactivated. b. all of the X chromosomes remain active. c. two X chromosomes remain active, and any more are inactivated. d. two X chromosomes remain active in females and one remains active in males; the rest are inactivated. e. only one X chromosome is inactivated.
Directional selection is demonstrated in
a. the color of peppered moths in England. b. the development of resistance to insecticides. c. the development of resistance to antibiotics. d. the coat color of rock pocket mice in Arizona. e. all of these.
Which structures make up the male reproductive whorl of a flower?
a. the sepals b. the carpels c. the stamens d. the receptacles
Which of the following conditions is due to a sex-linked gene?
A) color-blindness B) hemophilia C) muscular dystrophy D) inability to see red or green E) All of the answer choices are sex-linked conditions.