Primary productivity in estuaries is high because ____.?
A) ?light is seasonal and dim
B) ?nutrients are abundant
C) ?there is no saltwater
D) ?there are no primary consumers
B
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Which of the following statements is FALSE?
A. When governments set commodity prices to make urban life easier, rural populations often suffer, leading to further migration to cities B. Even crowded, squalid living conditions in expanding Third World cities are sometimes better than what people have in the countryside C. Agricultural mechanization is a major pull factor in urbanization of developing countries D. Political instability can play a major role in urban growth E. All of these are true
The basic lithostratigraphic unit; a mappable unit of strata with distinctive upper and lower
boundaries:a. series d. rock b. extrusive e. biozone c. formation
Gradients usually decrease downstream in a major river system
Indicate whether the statement is true or false
Judge the following sentence according to the criteria given below: Most marine animals live near the ocean surface BECAUSE they all need sunlight to survive
A) The assertion and the reason are both correct, and the reason is valid. B) The assertion and the reason are both correct, but the reason is invalid. C) The assertion is correct, but the reason is incorrect. D) The assertion is incorrect, but the reason is correct. E) Both the assertion and the reason are incorrect.