Question

(a) Define ecosystem.
(b) Autotrophs are at the first level of food chain. Give reason.
(c) In a food chain of frogs, grass, insects and snakes assign trophic level
to frogs.
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Answer 1

Answer:

a) all the plants and animals in a particular area considered together with their surroundings is called eco system.

b) Because autotrophs do not consume other organisms, they are the first trophic level. autotrophs are eaten by herbivores, organisms that consume plant.

Answer 2

Answer:

b) autorophs are at the first level because

Explanation:

they are the only organism which can observe the energy from son and make food by that energy no other organism can do this.and autotroph can be eaten by herbivores .