Question

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 :

A food chain will be more advantageous in terms of energy if it has

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.