Pesticide-resistant insects would
A) have evolved more slowly if the pesticides were used in just a few regions.
B) not have evolved if even more pesticide had been used.
C) have evolved more quickly if a different type of pesticide was used each year.
D) have evolved if an herbicide had been used instead of a pesticide.
A
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At the equator, the altitude of the 500 mb level is always larger than it is at the north pole because
A) the air usually has higher pressure at the equator B) the air is always denser at the equator C) the air is always warmer at the equator
Records indicate that sea level has ________ since 1870
A) decreased by 2.5 meters B) not changed C) decreased by 25 centimeters D) risen by 2.5 meters E) risen by 25 centimeters
Soundings only provide information that aids in the prediction of fog, air pollution alerts, and the downwind mixing of strong winds.
Answer the following statement(s) true (T) or false (F) a. True b. False
West African empires were based in
A. deserts B. tropical rainforests C. wetter parts of the savannah grasslands D. drier parts of the savannah grasslands