In a food chain, the third trophic level...

In a food chain, the third trophic level is always occupied by

carnivores

herbivores

decomposers

producers

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The correct Answer is:

In a food chain, the third trophic level is always occupied by carnivores that feed on herbivores.
The various steps in a food chain at which the transfer of food (or energy) takes place are called trophic levels.
Plants (producers or autotrophs) occupy the first trophic level, herbivores constitute the second trophic level, carnivores constitute the third trophic level and higher carnivores occupy the fourth trophic level.

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Increasing concentration of DDT in organisms of a food chain in higher trophic levels is known as

biological chain

biological value

biological magnification

biotic potential

Increasing concentration of DDT in organisms of a food chain in higher trophic level is known as:

Biological chain

Biological value

Biotic potential

Biological amplification

Productivity at the second trophic level is always

greater than the productivity at the first trophic level

less than the productivity at the first trophic level

equal to the productivity at the first trophic level

extremely variable compared to the productivity at the first trophic level