Question

Various steps in a food chain represent a

• A. Food web
• B. Trophic level
• C. Ecosystem
• D. Biomagnification

Answer 1

The correct option is B

Trophic level

The correct option is B.

Explanation of the correct option:

1. Various steps in the food chain represent the trophic level.
2. The food chain is a linear sequence of organisms that starts from producer organisms, continues through consumer organisms, and ends at decomposer species.
3. A trophic level is a specific position occupied by organisms in the food chain based on their source of food.
4. For example plants (producers) occupy the first trophic level. The second trophic level is occupied by herbivores and the third trophic level is occupied by carnivores.
5. The amount of energy decreases at successive trophic levels.

Explanation of the incorrect options:

Option A:

The Food web is the natural interconnection of food chains.

Option C:

The ecosystem is a biological community where organisms interact with each other and also with the physical environment.

Option D:

Biomagnification is defined as the accumulation of certain chemical substances in the body of organisms. Its concentration builds up on organisms at different trophic levels of the food chain.

Final answer:

Various steps in a food chain represent a trophic level.