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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Pollination is an example of ________.
a. a possible source of new drugs
b. chemical diversity
c. an ecosystem service
d. crop pest control
Describe two considerations in conservation preserve design
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.
Exotic species are especially threatening to what kind of
ecosystem?
a. deserts
b. marine ecosystems
c. islands
d. tropical forests
Which of the following statements is not
supported by this graph?
a. There are more vulnerable fishes than critically
endangered and endangered fishes combined.
b. There are more critically endangered amphibians
than vulnerable, endangered and critically
endangered reptiles combined.
c. Within each group, there are more critically
endangered species than vulnerable species.
d. A greater percentage of bird species are critically
endangered than mollusk species.
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