Question

Which of the following statements is true? Most of the heat energy lost during an energy transfer is absorbed by decomposers. About 90 percent of the energy in plant is transferred to a primary consumer. In order for an ecosystem to be balanced, the number of consumers must be greater than the number of producers. In a balanced ecosystem, the number of secondary consumers must be fewer than the number of primary consumers.

Answer 1

In a balanced ecosystem, the number of secondary consumers must be fewer than the number of primary consumers.

In a balanced ecosystem, the number of producers is ALWAYS the largest. As the trophic levels increase, the number of organism decrease, so primary consumers are less than producers, secondary consumers are less than primary consumers, and so on.

Answer 2

Producers, consumers and decomposers are a vital part of the food chain of the ecosystem. It is vital for sustaining the ecosystem, survival and maintenance of organisms.

The true statement is:

Option D. In a proportional ecosystem, secondary consumers must be less than primary consumers.

This can be explained as:

• The least amount of energy transferred is absorbed by decomposers.

• Only 10% of energy from the producers like plants are transferred to primary consumers.

• In the balanced food cycle of an ecosystem number of consumers cannot exceed producers.

Therefore, the number of secondary consumers must be less than that of primary consumers.

To learn more about ecosystem and food cycle follow the link:

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