Question

"Energy flow in food chain is always unidirectional. " justify this statement. Explain how the pesticides enter a food chain and subsequently get into our body. ​

Answer 1

Answer:

the flow of energy is uniderictional. the energy which passes to herbivores does not come back to autotrophs. the energy which is captured by autotrophs from sun cannot reVert back to sun. therefore in food chain ebergy moves prigresively through various trophic level. this energy is no more longer available to the lrevious trophic level. thus the flow of energy is unidirectionsl.

pesticides are sprayed on plants to protect them from attack of pests. these pesticides when washed away into the soil or water bodies get absorbed by the plants. when plants are consumed by man or other animals the pesticides enter our body.

Answer 2

Answer:

the flow of energy in food chain is unidirectional because the sun is the only source of energy for all ecosystems are not. then the energy is captured by the autotrophs does not revert back to the sun. therefore in the food chain the energy move progressively through various topics levels