Chapter 47: Q 10. (page 1400)
Pollination is an example of ________.
a. a possible source of new drugs
b. chemical diversity
c. an ecosystem service
d. crop pest control
The correct option is (c).
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With an extinction rate of 100 E/MSY and an estimated 10
million species, how many extinctions are expected to
occur in a century?
a. 100
b. 10,000
c. 100,000
d. 1,000,000
What was the name of the first international agreement on climate change?
a. Red List
b. Montreal Protocol
c. International Union for the Conservation of Nature
(IUCN)
d. Kyoto Protocol
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.
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
Exotic species are especially threatening to what kind of
ecosystem?
a. deserts
b. marine ecosystems
c. islands
d. tropical forests
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