The cassava is an important food crop for people living in sub-Saharan Africa. In the 1970s, mealybug infestations destroyed harvests and people starved
A researcher who studied the mealybug in its native environment discovered a parasitoid wasp that was a natural predator. After extensive testing to determine safety, the parasitoid wasp was introduced into the sub-Saharan region with tremendous effect controlling the mealybug throughout most of Africa. This approach represented a form of A) cultural control.
B) natural enemies control.
C) genetic control.
D) natural chemical control.
B
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A softball is tossed straight upward with 100 J of kinetic energy. If air resistance is negligible the ball will return to its initial level with a kinetic energy of
A. 100 J. B. more than 100 J. C. less than 100 J. D. need more information
Which of the following will neutralize an acid?
a stronger acid an artifact a hydrogen ion a buffer
At times in Earth’s history, volcanoes have been more active and large ice sheets have covered the continents. The fact
that this is not observed today contradicts uniformitarianism. a. True b. False
Currents within the surf zone that flow parallel to the shore are known as ________ currents
Fill in the blank(s) with correct word