When would a microbiologist want to use broth media?
A) when isolating colonies
B) when performing the streak plate isolation technique
C) when growing large batches of microbes
D) when observing specific culture characteristics
E) when testing for motility
Answer: C
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Which of the following is true regarding proto-oncogenes?
a. They are positive cell-cycle regulators. b. They are negative cell-cycle regulators. c. They are down-regulators of the cell cycle. d. They play no role in the cell cycle.
Cellular pH is kept near a value of 7 by the
action of
a. salts. b. buffers. c. acids. d. bases. e. water.
The carnivorous plant with two-sided leaves, each with highly sensitive trigger hairs for snapping shut on small animals is the
A. Venus flytrap. B. horsetail. C. sundew plant. D. pitcher plant. E. club moss.
Segmented worms (annelids), roundworms (nematodes), and flatworms (platyhelminths):
a. make up a monophyletic clade. b. are all asexual. c. are all internal parasites. d. are all bilaterally symmetrical. e. Only a) and d) are correct.