Construct.

(a) a long food chain, and

(b) a short food chain, ending with man.

At which trophic level a person is feeding when he is eating:

(a) Roasted chicken

(b) Bread

(c) Eggs

(d) Apple

(e) Fish

A student went to study a local pond. In one part of the pond she noticed tadpoles scraping at some pond weed. In another part she saw a water beetle holding a tadpole in its jaws.

(a) Construct a food chain for the pond.

(b) How many links are there in this chain?

State one advantage of using jute bags over plastic bags for shopping.

Write a common food chain of a pond ecosystem having four links.