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CBSE - X - Biology

Define the following terms:
i) Evolution
ii) 10 % energy law
iii)food chain
iv) Food Web

Asked by vijayjethi17 1st March 2017, 6:34 PM
Answered by Expert


Hi Vijay,

1. Evolution can be defined as the formation of more complex organisms from pre-existing simpler organisms over a certain period.

2. Ten Percent Law states that, ‘Only 10% of the energy entering a particular trophic level of organisms is available for transfer to the next higher trophic level’.

3. The sequential process of eating and being eaten is called a food chain.

4. A network of interconnecting food chains in a natural community of different organisms is called a food web.

Answered by Expert 2nd March 2017, 5:38 PM

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