The key function of wetlands is as ________.
A. a habitat for marine species, including commercially important species
B. a shipping refuge
C. a recreational ground for humans
D. a resource for many industrial chemical processes
E. a wasteland to be drained and used by humans
Answer: A
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How do waves propagate across the water?
A. the wave moves forward but water moves in a circular motion B. water within the wave travels as far as the wave does C. water near the surface moves less than water at depth D. All of these choices are correct.
Which of the following is a consequence of acidic deposition?
A) It leaches out important minerals from soils and causes a loss of biodiversity. B) It increases the likelihood of low-lying ground fogs. C) It is increasing the rate of global warming. D) It results in offshore eutrophication, damaging coral reefs. E) It creates rainwater that can damage skin cells or cause cancers.
_______ (the destruction of the resilience and the biological potential of arid and semiarid ecosystems) is an unnatural and human-induced change that has been quite common in the Sahel region for the last several decades
Fill in the blank(s) with correct word
It is impossible for a country to have a negative rate of natural increase
Indicate whether this statement is true or false.