Question

Cows eating grass belong to which trophic level?
A) Primary consumers
B) Secondary consumers
C) Scavengers
D) Decomposers
E) Producers

Answer 1

Hint:A food chain is a complex network which shows how different organisms are linked and how the transfer of energy takes place between them in the form of food. The food chain has different levels and these levels represent a trophic level.

Complete answer:
Let us go through each of the options given carefully,
Option A: Primary consumers are those animals which consume the producers- the green plants. Grass is an example of a producer which makes the cow a primary consumer and thereby this option is a perfect fit. This is the correct option.

Option B: Secondary consumers are those which consume the primary consumers. Therefore, this option is incorrect.

Option C: Scavengers are those animals which prey on the dead organisms- both plants and animals (mainly). Therefore, this option is incorrect.

Option D: Decomposers are organisms which break down organic material step by step from dead decaying plants and animals and recycle those nutrients in the environment. Therefore, this option is incorrect.

Option E: Producers are nothing but the green plants which produce food through photosynthesis. Therefore, this option is incorrect.

Hence the correct answer is option ‘A’.

Note:A food web is a large number of food chains interlinked together implying the transfer of food energy from the producers through herbivores to carnivores. It establishes a feeding relationship within a community and every ecosystem comprises a different mesh of food chains. A food web shows us the direct as well as the indirect interaction between various species.