AP Biology Unit 8 Review

Front

What is the energy available to secondary consumers if 700,000 kJ of energy is stored in autotrophs?

Back

7,000 kJ

Front

What role do decomposers play in an ecosystem?

Back

They return nutrients to the soil.

Front

What type of growth is characterized by a J-shaped curve in the human population?

Back

Exponential Growth

Front

What is a species that has a large, positive impact on its ecosystem called?

Back

Keystone species

Front

Why are there seldom more than five trophic levels in a food chain?

Back

Energy is lost from each trophic level.

Front

Define autotrophs.

Back

Organisms that produce their own food, typically through photosynthesis.

Front

What is a food web?

Back

A complex network of feeding relationships among organisms in an ecosystem.

Front

What is the difference between exponential growth and logistic growth?

Back

Exponential growth occurs without limits, while logistic growth accounts for carrying capacity.

Front

What is a trophic level?

Back

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

Front

What is the role of primary consumers in an ecosystem?

Back

They consume autotrophs and are typically herbivores.