The organelle responsible for radiant energy conversion to chemical energy is called the:
a. nucleus.
b. chloroplasts.
c. mitochondria.
d. flagella.
e. cytosol.
B
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What structures of the male and female reproductive systems do not share a common embryonic origin?
A. labia majora and scrotum B. labia minora and urethra C. clitoris and penis D. cervix and ejaculatory duct E. All of these pairs share a common embryonic origin.
What serves as the cardiac pacemaker?
a. sinoatrial node b. atrioventricular node c. gap junction d. the left ventricle e. conducting fiber
A person with a normal total cholesterol level:
A) is at high risk for an acute cardiac event if his or her HDL levels are elevated. B) will probably not develop coronary artery disease, even if his or her HDL levels are low. C) will likely not experience an acute cardiac event, even if his or her LDL levels are elevated. D) is still at risk for coronary artery disease if his or her LDL levels are elevated.
Pseudomonas aeruginosa is
A. found in soil and water. B. motile. C. highly chemical resistant. D. an opportunist that produces many diverse enzymes. E. All of these choices are correct.