Q6 of 66 Page 15

Pesticides added to the field is seen in increased amounts in the crop and in the birds that feed on them. What is the phenomenon called? ( CBSE 2013)

The phenomenon is ‘biomagnification’. It is the tendency of non-biodegradable substance such as pesticides to get accumulated as they move from one tropic level to the next.

More from this chapter

All 66 →
4

In the following food chain, 100 j of energy is available to the lion. How much energy was available to the producer?

. (CBSE 2010) 

 5

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

 7

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

 8

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