Swollen regions of underground stems that store starch are
A. stomata.
B. tubers.
C. always parasitic.
D. rhizomes.
E. tendrils.
Answer: B. tubers.
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If ADH secretion is inhibited, which of the following would initially result?
(A) The number of aquaporins would increase in response to the inhibition of ADH. (B) The person would decrease oral water intake to compensate for the inhibition of ADH. (C) Blood filtration would increase to compensate for the lack of aquaporins. (D) The person would produce greater amounts of dilute urine.
Which of the following is NOT an inhibitor of DNA and RNA synthesis?
A. Rifampin B. Erythromycin C. Metronidazole D. Nalidixic acid
What is the function of centrioles?
A) They are the structure that holds the two daughter chromatids together at the centromere. B) They cause cytokinesis via the concentric shortening of microtubules. C) They are required for DNA replication. D) They produce microtubules for the chromosomes to migrate along as they move to opposite poles of the cell.
In the fruit fly, Drosophila melanogaster, a spineless (no wing bristles) female fly is mated to a male that is claret (dark eyes) and hairless (no thoracic bristles). Phenotypically wild-type F1 female progeny were mated to fully homozygous (mutant)
males, and the following progeny (1000 total) were observed: Phenotypes Number Observed spineless 321 wild 38 claret, spineless 130 claret 18 claret, hairless 309 hairless, claret, spineless 32 hairless 140 hairless, spineless 12 What is the gene order? A) hairless, spineless, claret B) claret, spineless, hairless C) spineless, claret, hairless D) it is impossible to tell E) claret, hairless, spineless