Answers

2016-02-20T11:06:47+05:30
If the chemical is added to the plants itself the concentration of chemical would increase on each trophic level .
If it gets added to second trophic level than the first trophic level organisms would not get affected but the chain after second trophic level would be affected and the animal at the last trophic level would be affected the most as the concentration of chemical would be the highest in the last trophic level.

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