Which of the following act as the brakes of the cell cycle and prevent cells from dividing too quickly?
a. oncogenes
b. proto-oncogenes
c. cyclins
d. tumor suppressor genes
d. tumor suppressor genes
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Annual net primary productivity
A. is equal on all continents. B. generally increases from the equator to the poles. C. is greatest in the open ocean. D. is usually higher in warm areas. E. None of these choices are correct.
In which plant type is water not required for fertilization?
a. gnetophytes b. mosses c. ferns d. hornworts e. horsetails
The goals of masturbation for people in sex therapy are which of the following?
Besides biochemical tests, which techniques are also useful for identifying a bacterial specimen?
A) observation of general culture characteristics B) microscopy and observation of general culture characteristics C) microscopy and molecular genetics techniques and observation of general culture characteristics D) microscopy E) molecular genetics techniques