APES Unit 1 Review - The Living World

Front

What are the main reservoirs of carbon on Earth?

Back

The main reservoirs of carbon on Earth include the atmosphere, oceans, soil, and fossil fuels.

Front

What is a primary consumer?

Back

A primary consumer is an organism that eats producers (plants), also known as a herbivore.

Front

What is the chemical formula for ammonia?

Back

The chemical formula for ammonia is NH3.

Front

What does the direction of arrows in a food chain represent?

Back

The direction of arrows in a food chain represents the direction of energy flow.

Front

What is a food web?

Back

A food web is a complex network of feeding relationships among various organisms in an ecosystem.

Front

Define trophic levels.

Back

Trophic levels are the hierarchical levels in an ecosystem, comprising producers, primary consumers, secondary consumers, and so on.

Front

What is the 10% Rule in ecology?

Back

The 10% Rule states that only about 10% of the energy from one trophic level is transferred to the next level.

Front

What is nitrogen fixation?

Back

Nitrogen fixation is the process of converting atmospheric nitrogen (N2) into a form usable by living organisms, such as ammonia.

Front

What role do decomposers play in an ecosystem?

Back

Decomposers break down dead organic matter, returning nutrients to the soil and making them available for plants.

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.