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Chapter 5

Environment

Biology•Class 10•CBSE

13 Questions Available

Showing 13 questions on this page

“The maximum concentration of harmful chemicals accumulates in human beings?” State the phenomenon involved and justify this statement.

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Define (a) Biomass (b) Anaerobic degradation.

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What are two main components of our environment?

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In the food chain Grass → Deer → Lion operating in a forest, what will happen if all the (a) Lions are removed (b) Deer are removed.

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Observe the food chain: Plant (1000 kj) → Goat → Lion (a) If autotrophs occupying the first trophic level are called producers, what are herbivores called as? (b) How much energy does the lion get in the above food chain?

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Which compounds are responsible for the depletion of ozone layer?

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What is ozone? How does it protect the organisms on the earth?

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The flow of energy in the food chain is unidirectional. Why?

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Name any two abiotic components of an environment.

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What is environment?

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A high concentration of harmful chemical is highly injurious, even fatal to higher trophic level organisms. Mention the basis of classifying substances as biodegradable and non-biodegradable. Give two examples of each.

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In a food chain comprising frogs, insects, birds and grass, which one of the organisms is likely to have maximum concentration of harmful non-biodegradable chemicals in the body.

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Why are green plants called producers?

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Environment

“The maximum concentration of harmful chemicals accumulates in human beings?” State the phenomenon involved and justify this statement.

Define (a) Biomass (b) Anaerobic degradation.

What are two main components of our environment?

In the food chain Grass → Deer → Lion operating in a forest, what will happen if all the (a) Lions are removed (b) Deer are removed.

Observe the food chain: Plant (1000 kj) → Goat → Lion (a) If autotrophs occupying the first trophic level are called producers, what are herbivores called as? (b) How much energy does the lion get in the above food chain?

Which compounds are responsible for the depletion of ozone layer?

What is ozone? How does it protect the organisms on the earth?

The flow of energy in the food chain is unidirectional. Why?

Name any two abiotic components of an environment.

What is environment?

A high concentration of harmful chemical is highly injurious, even fatal to higher trophic level organisms. Mention the basis of classifying substances as biodegradable and non-biodegradable. Give two examples of each.

In a food chain comprising frogs, insects, birds and grass, which one of the organisms is likely to have maximum concentration of harmful non-biodegradable chemicals in the body.

Why are green plants called producers?