Question

energy flow in food chain is always unidirectional justify the statement explain how the pesticides enter the food chain and subsequently get into our body

Answer 1

the pesticides we use in crops enters to food chain as when we eat food that comes crops enter our body directly.But indirectly food eaten by primary consumer are eaten by secondary or tertiary consumers i.e human

Answer 2

1.Because the energy moves progressively through the various trophic levels and is no longer available to the previous trophic level. The energy captured by autotrophs does not revert back to the solar input.

2.Pesticides, used for crop rotection when washed down into the soil/water body, are absorbed by the plant/producer along with water and minerals.

3.Being non-biodegradable these chemicals get accumulated progressively in the food chain and enter our body.