2nd of March 2017

Define the following terms:

i) Evolution

ii) 10 % energy law

iii)food chain

iv) Food Web

Vijay Jethi - CBSE - Class X

Wednesday, March 01, 2017 at 18:34:PM


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.

Thursday, March 02, 2017 at 17:38:PM