Ecology Review

Ecology is best described as

• interactions among cells

• interactions among organisms

• individual cells

• individual organisms

Group of different species in a given area?

• population

• ecosystem

• community

• biome

Major regional or global community of organisms is a(n)

• ecosystem

• population

• comunity

• biome

_____ is an example of a biotic factor.

• sunlight

• stream

• tree

• rock

Why is wind an abiotic factor?

• it is not related to biodiversity

• it is a nonliving thing

• it is in equilibrium

• it is not in any ecosystem

Rain forest = high biodiversity. Why?

• has many abiotic factors

• has some endangered species

• has few connections between living things

• has a wide variety of living things

Keystone species

• go unnoticed if its number decreases

• alters an area by building bridges and dams

• leads to a decrease in an areas biodiversity

• have an unusually large impact on its ecosystem

Beavers are sometimes trapped for their fur. What could be one effect of increased trapping of beavers in an area?

• biodiversity among the areas fish would increase

• the number of herons and kingfishers would decrease

• there would be more nesting areas for waterfowl

• more trees would be cut down

An organism that makes its own food

• consumer

• producer

• heterotroph

• chloroplast

Elk are considered a consumer because they

• get energy by eating other resources

• make their own food

• form carbs using chemicals

• use sunlight for energy