The risk of introducing a natural enemy to control an invasive species is that
A) it might drive the invasive species to extinction.
B) the natural enemy might also become an invasive pest.
C) the natural enemy might evolve into a new species.
D) the natural enemy may introduce genetic diversity into the invasive species.
B
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"A rising sea temperature results in a higher sea level." Evaluate this statement
A) It is false; more evaporation occurs at higher temperatures. B) It is true; materials expand at higher temperatures. C) It is true; the large quantity of glacier ice that melts when the sea temperature is higher. D) It is false; when the sea temperature is higher, more water is returned to the continents.
Current global-average temperatures are about ______ than they were in 1945. [INSERT FIGURE 3-32. INCLUDE CAPTION]
A) 0.1oC cooler B) 0.5oC cooler C) 0.1oC warmer D) 0.5oC warmer
Ascending parcels of unstable air seldom extend above the tropopause because
A) the troposphere is extremely stable B) the troposphere is extremely unstable C) the stratosphere is extremely stable D) the stratosphere is extremely unstable
The front on the right is a
A) warm front. B) cold front. C) stationary front. D) occluded front.