Ecosystems and Food Chains

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What is the main purpose of a food web in an ecosystem?

To display the reproductive behavior of organisms

To illustrate the population growth in the ecosystem

To represent all of the food chains within the ecosystem (correct)

To show the physical characteristics of organisms

How does energy flow through an ecosystem according to the text?

In a one-way flow without any interactions

In a linear manner from producers to quaternary consumers (correct)

Energy can flow between organisms in different food chains

Energy is evenly distributed among all trophic levels

Why is energy flow within a food web described as interconnected?

Because energy flow never involves any losses

Due to the complex feeding relationships between organisms (correct)

Because the energy conversion is always 1:1

Because energy flows only in one direction within a food web

What rule of thumb describes the energy transfer between trophic levels?

$10 %$ of energy is transferred between trophic levels Signup and view all the answers

If a grasshopper has 200 kilojoules of energy and is eaten by a robin, how much energy would be transferred to the robin based on the 10% rule?

20kj of energy Signup and view all the answers

Why is only 10% of the energy transferred between trophic levels?

Due to losses such as heat, metabolism, or unconsumed matter Signup and view all the answers

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

$90 %$ is typically lost due to various factors Signup and view all the answers

How does a food web differ from a food chain?

A food web shows multiple interconnected feeding relationships while a food chain shows just one linear path Signup and view all the answers

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

$Because it helps understand how energy flows and cycles within ecosystems$ Signup and view all the answers

What do food webs represent in an ecosystem?

All the food chains within an ecosystem Signup and view all the answers

How is energy transferred between organisms in a food web?

10% from one trophic level to the next Signup and view all the answers

What is the primary reason for the 10% energy transfer rule between trophic levels?

To account for energy lost as heat and metabolism Signup and view all the answers

Why is the energy flow within a food web described as complex?

Energy can flow between different food chains Signup and view all the answers

If a rabbit consumes 400 kilojoules of energy from vegetation, how much energy would be transferred to a wolf that eats the rabbit, following the 10% rule?

40 kilojoules Signup and view all the answers

What happens to the remaining 90% of energy that is not transferred to the next trophic level?

It is lost as heat, through metabolism, or left behind as unconsumed matter 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

What is the significance of understanding energy flow within an ecosystem using food webs?

To comprehend how energy sustains life in ecosystems Signup and view all the answers

Ecosystems and Food Chains

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Questions and Answers

What is the main purpose of a food web in an ecosystem?

How does energy flow through an ecosystem according to the text?

Why is energy flow within a food web described as interconnected?

What rule of thumb describes the energy transfer between trophic levels?

If a grasshopper has 200 kilojoules of energy and is eaten by a robin, how much energy would be transferred to the robin based on the 10% rule?

Why is only 10% of the energy transferred between trophic levels?

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

How does a food web differ from a food chain?

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

What do food webs represent in an ecosystem?

How is energy transferred between organisms in a food web?

What is the primary reason for the 10% energy transfer rule between trophic levels?

Why is the energy flow within a food web described as complex?

If a rabbit consumes 400 kilojoules of energy from vegetation, how much energy would be transferred to a wolf that eats the rabbit, following the 10% rule?

What happens to the remaining 90% of energy that is not transferred to the next trophic level?

How does a food web differ from a food chain?

What is the significance of understanding energy flow within an ecosystem using food webs?

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