Which of the following factors influence the
opening and closing of the stomata?
a. rate of photosynthesis
b. water availability
c. concentration of carbon dioxide in the leaf
d. light intensity
e. all of these
E
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Double fertilization is:
A. fertilization of two eggs in the same flower B. fertilization of an egg by two sperm C. fertilization of an egg by one sperm and of the nucleus of an endosperm-forming cell by another sperm D. fertilization of two eggs by the same sperm E. fertilization of an egg and an endosperm-forming cell by the same sperm
How many nucleotides are different in one sequence from those in the other?
a. 1 b. 2 c. 3 d. 4
Gene inactivation is likely to produce
A. paralogs. B. horizontal gene transfer (HGT). C. homologues. D. orthologs. E. pseudogenes.
In the male, the primary target of FSH is
A) the prostate gland. B) seminal vesicles. C) Sertoli cells. D) bulbourethral glands. E) interstitial cells.