Ecosystem Unit Test Review

Front

What is commensalism?

Back

A relationship between two organisms in which one organism is not affected.

Front

What happens if nitrogen-fixing bacteria are reduced in an ecosystem?

Back

The level of nitrogen gas in the atmosphere would increase.

Front

What type of relationship do both organisms benefit?

Back

Mutualism.

Front

Which organism has the least amount of energy in an ecosystem?

Back

Wolves.

Front

What explains the increase in the population of cougars after a fire?

Back

The fire forced more prey animals into a smaller area for them to hunt.

Front

Define ecosystem.

Back

A community of living organisms and their interactions with their environment.

Front

What is the role of producers in an ecosystem?

Back

Producers, like plants, convert sunlight into energy through photosynthesis.

Front

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

Back

A food chain is a linear sequence of organisms, while a food web is a complex network of interconnected food chains.

Front

What is the significance of decomposers in an ecosystem?

Back

Decomposers break down dead organic matter, recycling nutrients back into the soil.

Front

What is the definition of mutualism?

Back

A symbiotic relationship where both organisms benefit.