Q. 94.8( 4 Votes )
Why do all food chains start with plants and have a limited number of tropic levels?
● Every food chain begin with plants or any photosynthetic organisms because these are producers produce food for all other organisms in the food chain.
● Trophic levels in the food chains can’t be more than 4 or 5 because during energy transfer only 10% energy is transferred to the next level. Top consumer gets only small amount of energy. Hence, it will be difficult to sustain more than 5 trophic levels in a single food chain.
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