Q7 of 66 Page 15

Why is a lake considered to be a natural ecosystem? ( CBSE 2015)

Every ecosystem has abiotic (non-living) things) and biotic (living things and there is interaction between living and non-living things. In lake also there is interaction between abiotic components such as water, temperature, soil with biotic components such as plants and animals living in and around the lake.

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In which form do the plants store the trapped solar energy? ( CBSE 2005)

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 8

State one reason to justify the position of man at the apex of most food chains.
( CBSE 2012)

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Which compounds a