The level of the oceans is rising due to ____
a. ozone depletion
b. global warming
c. lost species biodiversity
d. increased precipitation
e. acid rain
ANSWER: b
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Photosynthesis ceases when leaves wilt, mainly because _____
A) the chlorophyll in wilting leaves is degraded B) flaccid mesophyll cells are incapable of photosynthesis C) stomata close, preventing carbon dioxide from entering the leaf D) photolysis, the water-splitting step of photosynthesis, cannot occur when there is a water deficiency E) accumulation of carbon dioxide in the leaf inhibits enzymes
Small cells function more effectively, because as cells become larger their surface area to volume ratio:
A. decreases. B. is cubed. C. increases. D. stays the same. E. is squared.
The theory of catastrophism
a. was proposed by Lyell. b. indicates that a series of disasters necessitated separate acts of creation to replace species that became extinct. c. states that one worldwide disaster led to massive extinction and subsequent replacement by a new creation. d. held that after geologic events caused extinctions, the world was repopulated by the surviving species. e. has absolutely no basis in fact because extinctions just happen with no apparent patterns.
Clusters of cell bodies of neurons outside the central nervous system are known as
a. nerve cords. b. ganglia. c. a plexus. d. notochords. e. nerves.