Biology: The Dynamics of Life, California Edition

Section 1: Vanishing Species

Vanishing Species

1.
What is the difference between a threatened species and an endangered species ?
A)A threatened species is already extinct. An endangered species means that the population's numbers have increased greatly over the last 5 years.
B)A threatened species means that the population is likely to become endangered. An endangered species is already extinct.
C)A threatened species means that the population is likely to become endangered. An endangered species has population numbers so low that it is likely to become extinct.
D)A threatened species and an endangered species are the same thing.
2.
When the last member of a particular species dies, the species is said to be __________.
A)isolated
B)extinct
C)endangered
D)diversified
3.
Which of these statements is true?
A)Tropical regions of Earth contain very few of the world's land species.
B)Biodiversity tends to increase as you get closer to the equator.
C)Coral reefs tend to be less biologically diverse than temperate deciduous forests.
D)Cold climates have greater amounts of biodiversity than warm climates.
4.
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What does this figure illustrate?
A)biodiversity
B)habitat fragmentation
C)extinction
D)edge effect
5.
Cyclosporine is a drug that is used to help organ transplant patients fight off rejection of their new organs. What organism was used to help isolate this drug?
A)bacterium
B)protist
C)plant
D)soil fungus
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