The C-terminus of a polypeptide always contains
A. a stop codon.
B. a carboxyl group
C. an amino group.
D. carbon dioxide.
E. None of the answers are correct.
B
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Double fertilization occurs when
A. the sperm and tube nuclei fertilize the egg. B. one sperm fuses with the egg and the other sperm fuses with both polar nuclei. C. the polar nuclei fuse with the egg after it has fused with the sperm. D. two sperm cells fertilize the two polar nuclei.
Introduction of alien or exotic species into new ecosystems can occur through
A. accidental transport by ship or plane without anyone's knowledge. B. agricultural and horticultural activities. C. colonization when new settlers arrive in an area. D. All of the choices are correct.
Which of the following explains why damage to the spleen reduces the production of granulocytes?
a) damage to the spleen reduces the production of granulocytes b) damage to the spleen causes massive blood loss c) damage to the spleen results in loss of clotting ability d) damage to the spleen results in decreased red blood cell production and maturation
_____ Manual of Systematic Bacteriology is a manual of bacterial descriptions and classifications.
A. Pasteur's B. Lister's C. Bergey's D. Leeuwenhoek's E. Koch's