Q. The energy transfer law of food chain was given by:

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Solution:

According to law of Lindemann, the energy decreases at each trophic level of food chain, as part of the energy is lost as heat and respiration.
Only chemical energy of previous trophic level is retained by next trophic level. The term ecosystem was first used by Tansley in .
W.M. Stanley isolated TMV in crystals form. Weismann gave germ plasm theory.