APES Unit 1 Review: Ecosystems, Cycles, and Biomes

Front

What happens to energy as it moves through the food web?

Back

Energy is lost as heat.

Front

Which biome has surprisingly poor soil due to nutrient storage in plants?

Back

Tropical rainforest.

Front

What is the unusable chemical form of carbon for plants?

Back

N2 gas.

Front

In which regions is most of the world's food grown?

Back

Temperate regions.

Front

Which organism occupies the lowest trophic level?

Back

Rabbit.

Front

Define 'trophic level'.

Back

A trophic level is a position in a food chain or food web, representing the flow of energy and nutrients.

Front

What is the primary source of energy for ecosystems?

Back

The sun.

Front

Explain the concept of 'biomagnification'.

Back

Biomagnification is the process by which the concentration of toxic substances increases in organisms at each successive level of the food chain.

Front

What role do decomposers play in an ecosystem?

Back

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

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.