A limiting factor for viral infection is
A. internal metabolic temperature of the host cell.
B. nutrition of the host cell.
C. stage of cell cycle of the host cell.
D. presence of specific receptor molecules on the host cell.
D
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A technique used in dating a rock can be used to accurately predict the age of the fossils occurring in the rocks. This technique involves
A. fossil dating. B. successive rock layering. C. radioactive isotope decay. D. structural geology. E. developmental geology.
How many of glucose's carbons are converted to CO2 at the end of aerobic respiration?
a. 1 b. 2 c. 3 d. 4 e. 6
The efficient use of which of the following energy resource is limited by geographical location?
a. coal b. gas c. wind d. nuclear e. oil
The most probable cause for the difference in mean stem length between plants in dish A and plants in dish B is which of the following?
(A) Shortening of cells in the stem in response to the lack of light (B) Elongation of seedlings in response to the lack of light (C) Enhancement of stem elongation by light (D) Genetic differences between the seeds