Tundra is found
a. Where average temperatures are low and growing seasons are short
b. Near the poles
c. At high altitudes
d. A and B are correct
e. A, B, and C are correct

Which of these statements about aquatic biomes is true? Select True or False for each statement.

T/F The ocean is so vast that it is not influenced by human impacts.

T/F Water depth, water flow, salinity, and nutrient availability are important abiotic factors in aquatic biomes.

T/F Once nutrients sink to the bottom of lakes, they are no longer available to organisms.

Which of the following biomes is most common on Earth's land surface?

a. Chaparral

b. Desert

c. Temperate forest

d. Tundra

e. Boreal forest

When climbing a mountain, we can observe transitions in biological communities that are analogous to the changes

a. In biomes at different latitudes

b. In different depths in the ocean

c. In a community through different seasons

d. In an ecosystem as it evolves over time

Explain how the open ocean is similar to the desert, and how it is not.

Suppose that the number of bird species is determined mainly by the number of vertical strata found in the environment. If so, in which of the following biomes would you find the greatest number of bird species?

a. Tropical rain forest

b. Savanna

c. Desert

d. Temperate broadleaf forest

The open ocean and tropical rain forests contribute the most to Earth's net primary production because

a. Both have high rates of net primary production

b. Both cover huge surface areas of Earth

c. Nutrients cycle fastest in these two ecosystems

d. The ocean covers a huge surface area, and the tropical rain-forest has a high rate of production

Temperate forest in China and temperate forest in North America are part of the same biome but are distinct ecosystems. Explain.

Which statement best describes the desert biome?

a. It is found wherever temperatures are high

b. It contains a larger amount of biomass per unit area than any other biome

c. Its dominant vegetation is adapted to conserve water

d. Most are located at the equator; e. It is not suitable for human habitation