In the following food chain, only 2J of energy was available to the peacocks. How much energy would have been present in Grass ? Justify your answer. GRASS->GRASS->HOPPER->FROG->SNAKE->PEACOCK

Science Class 10 Term 2, Answer to the question – In the following food chain, only 2J of energy was available to the peacocks. How much energy would have been present in Grass ? Justify your answer. GRASS->GRASS->HOPPER->FROG->SNAKE->PEACOCK

The answer to the question –

Energy present in Grass = 20000J

Justification: According to the ten percent law of energy in a food chain, only ten percent of energy is transferred to the next trophic level. Thus, the energy keeps on decreasing by 10% at each level.

*Explanation for students:

If, Energy available to grass = 20000J

Energy available to grass hopper = 10% of 20000 = 2000J

Energy available to frog = 10% of 2000 = 200J

Energy available to snake = 10% of 200 = 20J

And Energy available to peacock = 10% of 20 = 2J

Hence, justified