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CBSE Notes 2011-2012 » X-Science-Term2

Our Environment

Which of the following are environment-friendly practices ?

Multiple choice question

Which of the following are environment-friendly
practices ?

DDT was accidently added to the water of a lake. All the organisms in it would be affected by DDT. W...

Multiple choice question

DDT was accidently added to the water of a lake. All the
organisms in it would be affected by DDT. Which of the
organisms would be affected the most ?

Which one of the following is an artificial ecosystem ?

Multiple choice question

Which one of the following is an artificial ecosystem ?

Ultraviolet radiation from sunlight causes a reaction which produces

Multiple choice question

Ultraviolet radiation from sunlight causes a reaction which
produces

In a food chain, the third trophic level is always occupicd by

Multiple choice question

In a food chain, the third trophic level is always occupicd by

Trophic level in an ecosystem represents

Multiple choice question

Trophic level in an ecosystem represents

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