When the climax community appears,
A) biodiversity increases.
B) the total energy fixed exceeds the energy used by respiration.
C) K-selected species become increasingly favored over r-selected species.
D) All of these happen.
C) K-selected species become increasingly favored over r-selected species.
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Pollutants such as chlorofluorocarbons deplete atmospheric ozone
A. When chlorine-containing molecules are oxidized at the expense of O3 B. When carbon reacts with O3 to form CO3 C. When nitrogen combines with O3 to form NOx D. Because chlorine is most stable as ClO3 E. None of these is correct
What must occur in order for a metamorphic rock to become a sedimentary rock?
A) weathering B) solidification C) melting D) cooling
Which of the following is true of most fatty acids found triglycerides?
A) they are branched B) they contain 10 to 20 carbon atoms C) they contain an odd number of carbon atoms D) none of the above
The hot, desert air of the Sahara often contains ____ water vapor than the cold, polar air farther north, therefore has a ____ specific humidity
a. less; lower b. less; higher c. less; similar d. more; higher e. more; lower