Life Science Review

Front

What is an ecosystem?

Back

An ecosystem is all the living and nonliving things that exist and interact in one place.

Front

Why are vestigial structures evidence for evolution?

Back

They are not useful in the organism but they were probably useful in some ancestor of that species.

Front

How do organisms in an ecosystem interact?

Back

Organisms in an ecosystem work together as a unit.

Front

What does a food chain represent?

Back

A food chain represents the flow of energy and nutrients through different organisms in an ecosystem.

Front

Why are homologous structures important to the theory of evolution?

Back

They provide evidence that many species must have had a common ancestor.

Front

What are producers in an ecosystem?

Back

Producers are organisms that create their own food, typically through photosynthesis, and are the foundation of the food chain.

Front

What are consumers in an ecosystem?

Back

Consumers are organisms that cannot produce their own food and rely on eating other organisms.

Front

What is a population in ecological terms?

Back

A population is a group of individuals of the same species living in a specific area.

Front

What role do decomposers play in an ecosystem?

Back

Decomposers break down dead organic material, returning nutrients to the soil and supporting new plant growth.

Front

What is natural selection?

Back

Natural selection is the process by which organisms better adapted to their environment tend to survive and produce more offspring.