Of all the plant hormones, which one is a gas?

a. auxin
b. cytokinin
c. gibberellin
d. ethylene
e. abscisic acid


ANSWER: d

Biology & Microbiology

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Phytoplankton of the open ocean are very small in order to:

a. avoid detection by grazers. b. maximize their surface area. c. increase their sinking rates. d. none of the above

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The amount of Earth's surface required to support a particular level of development and consumption in a sustainable fashion is called:

a. carrying capacity b. replacement rate c. ecological footprint d. demographic transition e. logistic growth

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In sickle cell anemia, glutamic acid is

substituted for

a. valine b. lysine c. serine d. arginine e. phenylalanine

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Transgenic organisms can be created by

A) electroporation. B) direct injection. C) infection with a vector. D) cloning. E) electroporation, direct injection, or infection with a vector.

Biology & Microbiology