Four of the five choices listed below are possible
causes of extinction. Select the exception.
a. asteroid impact
b. conservation
c. tectonic change
d. human activity
e. climate change
Answer: b
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Rich sources of stored energy that are dissolvable in organic solvents are
(a) carbohydrates. (b) proteins. (c) glucose. (d) lipids.
Which number identifies the structure that facilitates movement?
a. 1 b. 2 c. 3 d. 4 e. 5
What would be the phenotype of an int? mutant?
A) The phage would not be able to undergo the lytic cycle, but could lysogenize. B) Both lytic and lysogenic pathways would be inactivated. C) The phage would be able to enter the lytic cycle, but would not be able to lysogenize. D) The phage would be able to lysogenize but would not be able to be induced to resume the lytic cycle. E) The cell would build up high levels of repressor, so lysogeny would be maintained.
What response would correct for a drop in glomerular blood pressure?
A. Angiotensin II-mediated inhibition of the adrenal cortex B. Inhibition of osmoreceptors in the brain, leading to decreased thirst C. Inhibition of antidiuretic hormone release by the posterior pituitary gland D. Dilation of the afferent renal arterioles by angiotensin II E. Stimulation of sodium secretion by the distal convoluted tubules