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Row 1, Col 1

Which biome would have the lowest net primary production?a. tropical rain forestb. temperate grasslandc. coral reefd. desert

d. desert

1,2

A species that is at serious risk of extinction is called a(n) a. threatened species.b. invasive species.c. endangered species.d. extirpated species.

c. endangered species.

1,3

In a food web that consists of grass, mice, deer, coyotes, and hawks, which species is likely to have the greatest biomass?a. grassb. micec. coyotesd. hawks

a. grass

1,4

Every spring, many species of bird travel north to the Arctic to breed, and in the fall travel south again for the winter. This is an example ofa. immigration.b. emigration.c. migration.d. population growth.

c. migration.

2,1

Which biome would have the highest net primary production?

a. savannab. boreal forestc. coral reefs

d. desert

c. coral reefs

2,2

By far, the biggest cause of biodiversity loss today is a. climate change.b. over harvesting.c. habitat change and fragmentation.d. pollution.

c. habitat change and fragmentation

2,3

Any being that uses the sun’s energy to create sugars is aa. primary producer.b. secondary producer.c. primary consumer.d. secondary consumer.

a. primary producer.

2,4

In a mass extinction, the rate of extinction exceeds

a. 99%.b. 85%.

c. the rate of environmental change.d. the rate of background extinction.

d. the rate of background extinction

3,1

In the United States, what is the major law that protects biodiversity?a. Convention on Biological Diversityb. Endangered Species Actc. U.S. Fish and Wildlife Serviced. Species Survival Plan

b. Endangered Species Act

3,2

There is a plan to establish an 8000-kilometer-long strip of land across eight southeast Asian countries to rejoin fragments of tiger habitat. This is an example of aa. wildlife corridor.b. worldwide biodiversity treaty.c. captive breeding program.d. conservation concession.

a. wildlife corridor.

3,3

In the years immediately after a fire, a forest will experience a. primary succession.

b. secondary succession.c. tertiary succession. d. a climax community.

b. secondary succession

3,4

An interaction in which an individual of one species kills and consumes an

individual of another is called a. predation.b. parasitism.c. herbivory.

d. symbiosis.

a. predation.

4,1

High levels of biodiversity tend to a. have little or no effect on ecosystems.b. decrease an ecosystem’s resistance.c. make an ecosystem less resilient.d. increase the stability of an ecosystem.

d. increase the stability of an ecosystem

4,2

When the environment changes too quickly for an organism to adapt,

what will occur?a. evolution

b. speciationc. genetic drift

d. extinction

d. extinction

4,3

Which is the highest population density of grasshoppers?

a. 35 grasshoppers/10 square metersb. 40 grasshoppers/20 square meters

c. 1 grasshopper/1 square meterd. 50 grasshoppers/30 square meters

a. 35 grasshoppers/10 square meters

4,4

Criteria such as salinity, depth, and whether the water is flowing or standing are used by scientists to a. classify aquatic ecosystems.b. measure net primary productivity in lakes.c.distinguish aquatic ecosystems from terrestrial ecosystems.d. determine the number of species in a body of water.

a. classify aquatic ecosystems.

5,1

The latitudinal gradient is a natural pattern in which species diversity generally a. increases toward the equator.b. decreases toward the prime meridian.c. decreases in warmer climates.d. increases toward the poles.

a. increases toward the equator.

5,2

In the history of the world, how many mass extinctions have occurred?a. 5b. 7c. 10d. 13

a. 5

5,3

A population of wolves is reintroduced into Yellowstone National Park.

For the first decade, the wolf population grows exponentially. Then, the population growth slows. The new pattern is known as

a. logistic growth. b. limiting factors.

c. carrying capacity. d. exponential growth.

a. logistic growth.

5,4

Which zone of an aquatic ecosystem tends to have more life—both producers and consumers?a. aphotic zoneb. photic zonec. benthic zoned. All have roughly the same amounts of life.

b. photic zone