Question

Which of the following statements is correct ?

(1) Biomagnification refers to increase in concentration of the toxicant at successive trophic levels.

(2) Presence of large amount of nutrients in water restricts 'Algal Bloom'.

(3) Algal Bloom decreases fish mortality.

(4) Eutrophication refers to increase in domestic sewage and waste water in lakes.

Answer 1

Correct option is (1) Biomagnification refers to increase in concentration of the toxicant at successive trophic levels.

Biomagnification refers to increase in concentration of the toxicant such as DDT in successive trophic levels.