NC Biology EOC Review: Ecosystems

Front

What is Commensalism?

Back

A relationship between two organisms where one benefits and the other is neither helped nor harmed. Example: An egret looking for insects stirred up by the movement of a rhino.

Front

What happens to energy as it moves up trophic levels?

Back

Energy decreases as it moves up trophic levels due to energy loss at each level, typically only about 10% is transferred to the next level.

Front

How can the reintroduction of wolves benefit an ecosystem?

Back

It can eliminate weak animals from a prey population, thereby decreasing competition for natural resources.

Front

What is necessary for the carbon cycle to continue in a closed terrarium?

Back

All organisms must continue to exchange gases.

Front

Why is crop rotation beneficial for soil quality?

Back

It helps to preserve the quality of the soil by preventing nutrient depletion and reducing pest populations.

Front

Define Trophic Levels.

Back

The hierarchical levels in an ecosystem, comprising producers, primary consumers, secondary consumers, and tertiary consumers.

Front

What is the role of decomposers in an ecosystem?

Back

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

Front

What is the difference between competition and mutualism?

Back

Competition is when two organisms vie for the same resources, while mutualism is a relationship where both organisms benefit.

Front

What is a food web?

Back

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

Front

Explain the concept of an ecosystem.

Back

An ecosystem is a community of living organisms interacting with their physical environment.