Question

Assertion: Food chains generally consist of more than four trophic levels. (1)

Reason: There is a loss of energy at each trophic level and very little usable energy

remains after four trophic levels.​

Answer 1

. (a) The loss of energy at each step of food chain is so great that very little usable energy remains after four trophic levels. Hence, food chains generally consist of . only three or four steps.

Answer 2

Answer:

Therefore, the assertion is not entirely true and the reason is partially true, but it does not fully support the assertion.

Explanation:

The assertion is false, while the reason is partially true.

Food chains can consist of more than four trophic levels, but it is not necessarily the case that they generally do. It depends on the specific ecosystem and the availability of resources. Some food chains may be shorter or longer depending on the complexity of the ecosystem and the number of species involved.

The reason given is partially true. There is a loss of energy at each trophic level, with only a small amount of usable energy being transferred from one level to the next. This limits the number of trophic levels that can be supported in a food chain, as there may not be enough energy to sustain higher levels. However, this does not mean that food chains are limited to only four trophic levels, as some ecosystems may have enough energy to support more levels.

Therefore, the assertion is not entirely true and the reason is partially true, but it does not fully support the assertion.

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