Question

Plants → Deer → Lion In the given food chain, what will be the impact of removing all the organisms of second trophic level on the first and third trophic level? Will the impact be the same for the organisms of the third trophic level in the above food chain if they were present in a food web? Justify.

Differentiate between food chain and food web. In a food chain consisting of deer, grass and tiger, if the population of deer decreases, what will happen to the population of organisms belonging to the first and third trophic levels ?

Study the picture given below showing three food chains (a), (b) and (c) and answer the following questions :

Assertion (A) : Producers are capable of using light energy from the sun to make food available in an ecosystem. Reason (R) : All food chains in an ecosystem start with a producer.