Unit 1 Final Review

Front

What is a heterotroph?

Back

An organism that cannot produce its own food and instead obtains energy by consuming other organisms.

Front

What evidence supports the classification of clams as heterotrophs?

Back

Clams gain energy and nutrients by filtering particles from the water.

Front

What is the birthrate in Vernon's study of deer population?

Back

~50 deer/year.

Front

What is the death rate in Vernon's study of deer population?

Back

~70 deer/year.

Front

What additional observation indicates a stable deer population?

Back

About 20 deer per year immigrate to the tract of forest.

Front

What is a food chain?

Back

A linear sequence of organisms through which nutrients and energy pass as one organism eats another.

Front

What is a primary producer?

Back

An organism that produces its own food through photosynthesis or chemosynthesis, forming the base of the food chain.

Front

What is the correct model of a food chain?

Back

primary producer -> consumer -> consumer -> consumer -> consumer.

Front

What is a pyramid of numbers in an ecosystem?

Back

A graphical representation showing the number of individual organisms at each trophic level in an ecosystem.

Front

What is an example of a feeding interaction in an ecosystem?

Back

A tree that provides food for thousands of insects.