Chapter 47: Q 7. (page 1400)
The number of currently described species on the planet
is about ________.
a. 17,000
b. 150,000
c. 1.5 million
d. 10 million
Short Answer
The correct option is (c).
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Chapter 47: Q 7. (page 1400)
The number of currently described species on the planet
is about ________.
a. 17,000
b. 150,000
c. 1.5 million
d. 10 million
The correct option is (c).
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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
A mass extinction is defined as ________.
a. a loss of 95 percent of species
b. an asteroid impact
c. a boundary between geological periods
d. a loss of 50 percent of species
Explain what extinction threats a frog living on a mountainside in Costa Rica might face.
An adaptive radiation is________.
a. a burst of speciation
b. a healthy level of UV radiation
c. a hypothesized cause of a mass extinction
d. evidence of an asteroid impact

The Svalbard Global Seed Vault is located on
Spitsbergen island in Norway, which has an arctic
climate. Why might an arctic climate be good for seed
storage?
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