NEET BIOLOGY

Detailed explanation-1: -Bioaccumulation is a process of accumulation of chemicals in an organism that takes place if the rate of intake exceeds the rate of excretion. Chemicals are introduced into the organism through exposure to the abiotic environment (soil, water, air) or as dietary intake (trophic transfer).

Detailed explanation-2: -Various research studies have shown that pesticides are toxic to fish and it also has been shown that, at chronic levels, they have adverse effects such as oxidative stress, mutagenesis, developmental changes, histopathological changes, inhibition of ACHE activity, and carcinogenicity.

Detailed explanation-3: -POPs are lipophilic, which means that they accumulate in the fatty tissue of living animals and human beings (http://www.unece.org/spot/s01.htm).

Detailed explanation-4: -Among the various classes of pesticides, organochlorines and organophosphates are widely used. Organochlorines are known for their high persistence and toxicity characteristics. These pesticides cause neurological damage, endocrine disorders, and have acute and chronic health effects.