bio quiz 13.1-4

Which phrase best describes the focus of ecology?

• individual organisms
• individual cells
• interactions among organisms
• interactions among cells

What is the term for a group of different species in a given area?

• population
• ecosystem
• community
• biome

Studying a virtual ecosystem on a computer is an example of

• experimentation.
• modeling.
• surveying.
• observation.

Which of the following is an example of a biotic factor in an ecosystem?

• sunlight
• stream
• tree
• rock

Wind is considered to be an abiotic factor because it

• is not related to biodiversity.
• is a nonliving thing.
• is in equilibrium.
• is not in any ecosystem.

Which level of organization in ecology is the first to include abiotic factors?

• an ecosystem
• population
• community
• biome

A rain forest has a high level of biodiversity because it has

• many abiotic factors.
• some endangered species.
• few connections between living things.
• a wide variety of living things.

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

• Biodiversity among the area’s fish would increase.
• The number of herons and kingfishers (both eat fish) would decrease.
• There would be more nesting areas for waterfowl.
• More trees would be cut down.

An organism that makes its own food is called a(n)

• consumer.
• autotroph.
• heterotroph.
• chloroplast.

The basis for the energy in an ecosystem is provided by

• consumers.
• heterotrophs.
• chemosynthesis.
• producers.