How are fringing reefs, barrier reefs, and atolls related in structure and chronology?
a) Fringing reefs give rise to barrier reefs and then to atolls
b) Atolls form from seamounts
c) Barrier reefs develop from tablemounts
d) Fringing reefs, barrier reefs, and atolls are all the same age
A
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Which of the following is a branch of biology that focuses on interactions between living organisms and both the living and nonliving components of their environments?
A. Ecology B. Sustainability research C. Environmentalism D. Engineering E. Geography
The majority of China's renewable energy comes from
A) nuclear B) wind C) solar D) hydropower E) coal
Which of the following best describes air circulation at high latitudes?
A) Cold dense air rises at the poles, flows outward away from the poles, and rises between 60 and 45 degrees latitude. B) Cold dense air sinks at the poles, flows outward away from the poles, and rises between 60 and 45 degrees latitude. C) Cold dense air sinks at the poles, flows outward away from the poles, and sinks between 60 and 45 degrees latitude. D) Cold dense air rises at the poles, flows outward away from the poles, and sinks between 60 and 45 degrees latitude.
As a whole, over the past 70 million years there has been ________
A) a global cooling B) a global warming C) a global warming and then a global cooling D) no significant climate changes E) no way to determine if there have been climate changes