Environ. Final Review 2 (Organization , How Ecosystems Work)

Front

What is a community in ecology?

Back

A community is a collection of organisms that belong to different populations but all live in the same area and interact with one another.

Front

Which type of organism obtains energy only from primary producers?

Back

Herbivores are organisms that obtain energy only from primary producers.

Front

What is an autotroph?

Back

An autotroph is an organism that produces its own food supply from inorganic compounds.

Front

Which of the following is NOT a pioneer species?

Back

Pine Tree is not a pioneer species.

Front

What type of succession occurs when lichen breaks down rock?

Back

Primary succession occurs when lichen breaks down rock.

Front

Define an ecosystem.

Back

An ecosystem is a community of living organisms interacting with their physical environment.

Front

What role do decomposers play in an ecosystem?

Back

Decomposers break down dead organic material, recycling nutrients back into the ecosystem.

Front

What is the difference between a food chain and a food web?

Back

A food chain is a linear sequence of organisms through which nutrients and energy pass, while a food web is a complex network of interconnected food chains.

Front

What is ecological succession?

Back

Ecological succession is the process by which ecosystems change and develop over time.

Front

What is a keystone species?

Back

A keystone species is a species that has a disproportionately large effect on its environment relative to its abundance.