The most heat-tolerant organisms presently known come from
A) tropical deciduous forests.
B) tropical rain forests.
C) deep-sea hydrothermal vents.
D) tundras.
E) chaparrals.
C
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Suppose an antibody to bindin and sea urchin sperm were mixed together and the mixture was added to eggs. You predict that the antibody-treated sperm will _____
A) fertilize the eggs normally B) fertilize eggs from other species C) not bind to the egg membrane D) not be able to swim toward the egg
The biggest problem facing coastal habitats is not dumping but:
a. overfishing. b. river runoff. c. development. d. offshore oil spills. e. nuclear power plant leakage.
Which hormone is a gas that is soluble in water?
a. auxin b. abscisic acid c. ethylene d. cytokinin e. gibberellin
The hormone ________, produced by the pineal gland, may be involved in sleep-wake cycles in humans
Fill in the blank(s) with correct word