Question

A farmer is using nitrogenous fertilizers and insecticides in his crop in the field. this crop serves as food in the following chains.

1.cereal crop---> man
2.cereal crop-----> hen ----> man

(a)if the fertilizer and insecticide is eaten along with the cereals, will man be affected equally in both the cases.
(b)name and define the phenomenon involved
(c)if the crop field produces some amount of cereals in both cases, in which case man will get more amount of energy. justify your answer

Answer 1

a) No in 2. Food chain men gets more affected (due to biomagnification.)

b) Biomagnification, it is the increasing concentration of a substance, such as a toxic chemical, in the organisms at successively higher levels in a food chain.

c) in case 1. As men is direct consumes the producer means men is just at next tropic level but in 2. The tropic level of men increases and as only 10 percent of the energy at any trophic level is transferred to the next level in case 1 men receives more energy..

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