Question

An analysis of a soil sample revealed 0.1 mg of pesticide. The grains

produced on that soil had 1 mg of the pesticide. However, the

concentration of this pesticide was about 2mg in the adipose tissue of

birds inhabiting the area.

The variable concentration of pesticides is due to:

(a) food chain energy transfer

(b) diffusion

(c) biological magnification that has occurred

(d) type of pesticide used​

Answer 1

(c)biological magnification that has occurred

Biomagnification is the accumulation or increasing bioconcentration of lipophilic pesticides in the top members of the food chain. During biomagnification, the concentration of pesticides goes on increasing according to the food chain and highest values occur in the consumers of the top trophic level. So, the value of pesticide will go on increasing from the soil, to the plant and to the bird.

Thus, the correct answer is option C.