Many antibiotics selectively kill bacteria and not mammalian cells because they block synthesis of the ________.
A. cytoplasm
B. cytoskeleton
C. cell wall
D. nucleus
E. plasma membrane
Answer: C
Biology & Microbiology
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Radially symmetrical animals have loose meshes of neurons that are called
a. nerve nets. b. brain nets. c. ganglia nets. d. nerve cords. e. cephalization nets.
Biology & Microbiology
Do any of the dinosaurs appear to be omnivores?
a. Yes b. No
Biology & Microbiology
Opponents of the use of recombinant DNA technology in agriculture argue that the FDA should require the _____ of
food containing transgenic ingredients. a. labeling b. testing c. posting of safe handling guidelines d. cloning e. spreading
Biology & Microbiology
The progeny cells of a B-cell clone are called
A. antibodies. B. plasma cells. C. activated macrophages. D. Bursa cells. E. sensitized T-cells.
Biology & Microbiology