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Ecosystems and Food Chains Quiz

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Questions and Answers

What do food webs represent in an ecosystem?

Energy flow

Feeding relationships between organisms (correct)

Trophic levels

Individual organisms

How does energy flow in an ecosystem, according to the text?

In a linear pattern like a food chain

In a circular pattern

From the lowest trophic level to the highest trophic levels (correct)

From the highest trophic level to the lowest trophic levels

Why is energy flow within a food web not a perfect 1:1 conversion?

Due to sunlight availability

Due to losses from heat, metabolism, or uneaten matter (correct)

Due to genetic mutations

Due to evolution

What is the rule of thumb for energy transfer between trophic levels?

10% of energy is transferred Signup and view all the answers

In the example provided, if a grasshopper has 100 kilojoules of energy, how much energy would be transferred to the robin when the grasshopper is eaten?

10kj Signup and view all the answers

What happens to the remaining energy when 10% is transferred between trophic levels?

It decreases Signup and view all the answers

How does a food web differ from a food chain?

A food web includes multiple interconnected food chains Signup and view all the answers

Why is it important to understand food webs in an ecosystem?

To analyze energy flow and interconnectedness of organisms Signup and view all the answers

Which organisms typically belong to the highest trophic levels in an ecosystem?

Tertiary and quaternary consumers Signup and view all the answers

What happens to most of the energy as it moves up trophic levels?

It gets lost as heat or used in metabolic processes by organisms Signup and view all the answers