The sum of all of the chemical reactions that occur in a cell collectively are called
A. respiration.
B. metabolism.
C. anabolism.
D. reaction summary.
E. photosynthesis.
Answer: B
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If peach trees growing in specific mild climates of the southern United States do not receive about 850 hours of
temperatures below 40 degrees, they will not produce flowers in the spring. This is explained by which of the following terms?
a. photoperiodism b. phototropism c. senescence d. vernalization e. dormancy
An activated THÂ cell produces ________, which is a growth factor for T helper cells and cytotoxic T cells.
A. complement B. antiserum C. interleukin-12 D. interleukin-2 E. interleukin-1
In a wolf pack, the beta male
A) mates with all the females of the pack. B) is subordinate to the alpha female. C) is dominant over all members of the pack. D) is usually closely related to the alpha male.
In order for familial retinoblastoma to appear in the phenotype
A. one new mutation must occur in a normal tumor suppressor gene B. two new mutations must occur in a pair of normal tumor suppressor genes C. one new mutation must occur in a proto-oncogene D. an oncogene must mutate to a tumor suppressor gene