Question

A food chain has steps

• A. 2
• B. 3-4
• C. 6-7
• D. None of these

Answer 1

The correct option is B

3-4

The correct option is B.

Explanation of the correct option:

1. The transfer of energy and food from one organism to another at different trophic levels is called a food chain.
2. The 10% of the energy is available for transfer to another trophic level.
3. The organism at the highest trophic level has the least energy.
4. Therefore, there are 3-4 steps in the food chain because there is not enough energy for transfer after 3-4 trophic levels.

Explanation of the incorrect options:

Option A:

1. There is enough energy available for transfer from the second trophic level to the third trophic level.
2. Hence there are more than two steps in the food chain.

Option C:

1. There is not enough energy left to be transferred up to 6-7 steps.

Option D:

1. The food chain has 3-4 steps.

There are not more than four steps in the food chain as there is not enough energy available for transfer.