Almost all of the threats to biodiversity represented by the acronym HIPPO are related to the
A) overpopulation of the world by humans.
B) overuse of pesticides and herbicides.
C) introduction of exotic species to new parts of the world.
D) reliance upon fossil fuels to power human societies.
A
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A 2000-kg car experiences a braking force of 10,000 N and skids to a stop in 6 s. The speed of the car just before the brakes were applied was
A) 1.2 m/s. B) 15 m/s. C) 30 m/s. D) 45 m/s. E) none of the above
Glacio-eustatic factors refer to
A) changes in the total amount of water on Earth. B) a steady-state equilibrium in the water system. C) changes in sea level related to the increase or decrease in quantities of ice. D) changes in sea level related to the melting of icebergs.
Which of the following is an example of a detrital food chain?
A. sewage treatment plant B. salt marsh C. a coniferous forest D. open lake
At the start of the Mesozoic, the climate was ________
A) dry B) rapidly changing C) humid D) very warm E) very cold