Question

which trophic level has the highest concentration of toxic substances and why?
(class 10)​

Answer 1

Answer:

Answer. the last trophic level of a food chain has the highest concentration of toxic substances.

Explanation:

Top Carnivore or we can say secondary consumer has the highest concentration of toxic substances in a food chain... eg.zooplankton < phytoplankton < Fish < Eagle (Birds).

Inmany cases, animals near the top of the food chain are most affectedbecause of a process calledbiomagnification. Many of the mostdangerous toxins settle to the seafloor and then are taken in by organisms that live or feed on bottom sediments.

Bioaccumulation occurs whentoxins build up - or accumulate - in a food chain. The animals at the top of the food chain are affected most severely. This is what happens: Small amounts of toxicsubstances - often pesticides or pollution from human activity - areabsorbed by plants.

Answer 2

Answer:

The last trophic level of a food chain has the highest concentration of toxic substances.