Of all the plant hormones, which one is a gas?
a. auxin
b. cytokinin
c. gibberellin
d. ethylene
e. abscisic acid
ANSWER: d
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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
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
In sickle cell anemia, glutamic acid is
substituted for
a. valine b. lysine c. serine d. arginine e. phenylalanine
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.