Biology-18 Organisms and their environment

Front

What is a food web?

Back

A network or web of feeding interactions through which both energy and matter move in an ecosystem.

Front

What is nitrogen fixation?

Back

The process by which bacteria in the soil and lightning in the atmosphere convert nitrogen gas into a form that plants can use.

Front

What percentage of energy is transferred from one trophic level to the next in a pyramid of energy?

Back

About 10%.

Front

What are producers in a prairie ecosystem?

Back

Grass and bushes, which convert sunlight into energy through photosynthesis.

Front

What are abiotic components of a habitat?

Back

Non-living components such as soil, water, and air.

Front

What is a biomass pyramid?

Back

A graphical representation showing the total mass of living matter at each trophic level in an ecosystem.

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 role do decomposers play in an ecosystem?

Back

Decomposers break down dead organic matter, returning nutrients to the soil.

Front

What is the difference between biotic and abiotic factors?

Back

Biotic factors are living components of an ecosystem, while abiotic factors are non-living components.

Front

What is the significance of the nitrogen cycle?

Back

It is essential for converting nitrogen into forms that living organisms can use, supporting life.