chapter 6 test

A(n) ____ biome has an annual precipitation of less than 25 cm.

desert

A(n) tropical rain forest biome receives 200 to 450 cm of rain per year. 6. A forest with the greatest species diversity would be located near the ____.

equator

a forest with the greatest species diversity would be located near the

equator

The biome that has trees that lose their leaves during fall is called __________________

temperate deciduous forest

Biomes found up to 30 degrees north or south of the equator are often ______.

tropical rain forest

The incredibly diverse vegetation in________ is responsible for the evolution of numerous highly specialized animal species.

tropical rain forest

Due to extreme temperature conditions and simple, easily disrupted food chains, the ___________ is very sensitive to human disturbance.

tundra

Biomes are classified and often described according to their _______, which determines which other organisms that can live there.

vegetation

A forest that receives relatively little rainfall and has acidic soil would be located near the __________.

arctic circle

Animals that live in the desert a. hibernate in winter. b. are usually nocturnal. c. usually have thin skin to absorb water. d. include camels, moose, and various reptiles.

b

Biomes a. contain two ecosystems, hence the name "biome." b. are usually described by their vegetation. c. exist in limited regions of the world. d. All of the above

b

Grasslands, such as the prairies of North America, a. are suitable for corn and wheat, but not suitable for soybeans. b. are threatened by soil erosion because native grasses have been damaged or destroyed by plowing and overgrazing. c. support almost no animal life now that the millions of buffalo that once roamed there are gone. d. support a rich layer of dense grasses because they receive at least 250 cm (100 in.) of rain per year.

b

Which of the following best describes a tropical rain forest? a. dense, thick soil that supports a dense layer of plants on the forest floor b. species of animals with specialized ways of surviving in order to avoid competition c. very few species of trees, due to poor soil quality d. plants and animals that are very similar due to year-round warmth and moisture

b

If you visited a savanna, you would likely see a. large herds of grazing animals, such as rhinos, gazelles, and giraffes. b. a dense forest. c. snow and ice. d. a coastal ecosystem. chapter six english

a

The tundra a. has a layer of soil that is permanently frozen beneath the topsoil. b. is too cold to support insect life. c. is resistant to environmental damage because it is usually frozen. d. All of the above

a

Which of the following adaptations are used by animals of the Arctic tundra? a. Rodents burrow underground for winter protection. b. Deer and foxes use seasonal camouflage. c. Geese and caribou migrate to avoid predators. d. All of the above

a

Which of the following is not true about temperate deciduous forests? a. Trees grow lush green leaves in the spring, but lose their leaves in late summer. b. The soil is rich, and plants cover much of the forest floor. c. Animals such as squirrels, bears, and deer find food in the form of nuts, berries, and leaves. d. Both (a) and (b)

a

As you travel from the North Pole toward the equator, you would expect to see a. tropical rain forests, then deserts, then taiga. b. temperate deciduous forests, then taiga, then tropical rain forests. c. tundra, then grasslands, then tropical rain forests. d. taiga, then desert, then tundra.

c

Chaparral plants usually survive fires because a. they contain oils that act as natural fire extinguishers. b. water is stored in their small, leathery leaves. c. they can resprout from small amounts of surviving plant tissue. d. they have deep root systems that keep them moist during a fire.

c

Deserts are a. covered with sand and contain no plant life. b. found only in North America. c. often formed on the dry side of mountain ranges. d. never located in cooler climates.

c

Taiga is a. a cold, treeless, desert-like biome found near the North and South Poles. b. found mostly in Africa. c. a forest biome dominated by coniferous trees, such as pine, fir, and spruce. d. a dry, rocky biome found in the central part of South America.

c

Which of the following is an adaptation of coniferous trees in the taiga? a. They have a shallow root system, due to the acidic soil. b. They have leaves that retain water, due to their shape and waxy coating. c. They have a unique overall shape in order to accumulate snow, which acts as a heavy insulating layer. d. All of the above

c

Most _______ plants are low-lying evergreen shrubs and trees with small, leathery leaves.

chaparral

Adaptations demonstrated by plants in tropical rain forests include a. trees with aboveground roots called buttresses, which increase stability. b. orchids and vines that use tall tree trunks for support. c. herbs with large flat leaves located in the understory. d. All of the above

d

Which of the following statements is not correct? a. Grasslands have rich soil that supports abundant plant life. b. The tundra is a fragile biome because conditions are severe, and the ecosystem is easily disrupted. c. Chaparral fires are beneficial because they destroy trees that compete for light and space. d. Tropical rain forests are resistant to change because the plants contain so many nutrients.

d

Animals that have thick, scaly skin to prevent water loss would most likely be found in a(n) _____ biome.

desert

Animals such as pronghorn, bison, and badgers live on the North American _________.

grassland

Many forest biomes are experiencing ______ destruction, when land inhabited by an organism is destroyed or altered.

habitat

In the tundra, the frozen layer of soil just beneath the surface is called ___________.

permafrost