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Chapter 47: 16. (page 1401)
About what percentage of land on the planet is set aside
as a preserve of some type?
a. 1 percent
b. 6 percent
c. 11 percent
d. 15 percent
The correct option is (c).
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A secondary plant compound might be used for which of
the following?
a. a new crop variety
b. a new drug
c. a soil nutrient
d. a pest of a crop pest
Scientists measured the relative abundance of fern spores above and below the K-Pg boundary in this rock sample. Which of the following statements most likely represents their findings?
a. An abundance of fern spores from several species was found below the K-Pg boundary, but none was found above.
b. An abundance of fern spores from several species was found above the K-Pg boundary, but none was found below.
c. An abundance of fern spores was found both above and below the K-Pg boundary, but only one species was found below the boundary , and many species were found above the boundary.
d. Many species of fern spores were found both above and below the boundary, but the total number of spores was greater below the boundary.
Describe two types of compounds from living things
that are used as medications.
Which two extinction risks may be a direct result of the
pet trade?
a. climate change and exotic species introduction
b. habitat loss and overharvesting
c. overharvesting and exotic species introduction
d. habitat loss and climate change
Describe the mechanisms by which the human population
growth and resource use causes increased extinction
rates.
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