6.3 notes

Multiple Choice

If you visited a savanna, you would likely see

• large herds of grazing animals, such as rhinos, gazelles, and giraffes.

• a dense forest.

• snow and ice.

• a coastal ecosystem.

Multiple Choice

Grasslands, such as the prairies of North America,

• are suitable for corn and wheat, but not suitable for soybeans.

• are threatened by soil erosion because native grasses have been damaged or destroyed by plowing and overgrazing.

• support almost no animal life now that the millions of buffalo that once roamed there are gone.

• support a rich layer of dense grasses because they receive at least 250 cm (100 in.) of rain per year.

Multiple Choice

Which of the following is located primarily in coastal areas that have Mediterranean-style climates with warm, dry summers and mild, wet winters?

• tallgrass prairie

• savanna

• tundra

• chaparral

Multiple Choice

Chaparral plants usually survive fires because

• they contain oils that act as natural fire extinguishers.

• water is stored in their small, leathery leaves.

• they can resprout from small amounts of surviving plant tissue.

• they have deep root systems that keep them moist during a fire.

Multiple Choice

Adaptations of desert animals that help them survive in the hot, dry desert often include

• searching for water at midday.

• thin skin that readily absorbs water.

• large, bulky size to retain body heat on cold nights.

• searching for food at night.

Multiple Choice

Which of the following adaptations are used by animals of the Arctic tundra?

• Rodents burrow underground for winter protection.

• Deer and foxes use seasonal camouflage.

• Geese and caribou migrate to avoid predators.

• All of the above

Multiple Choice

The tundra

• has a layer of soil that is permanently frozen beneath the top soil.

• is too cold to support insect life.

• is resistant to environmental damage because it is usually frozen.

• All of the above