NEET BIOLOGY

Detailed explanation-1: -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-2: -The 2, 4-D is a water-soluble pesticide able to rapidly break down by biological action and therefore is less likely to accumulate in soil and has less persistency [15].

Detailed explanation-3: -THEIR ACTIONS Brown (1951) has classified insecticides into five groups, based on mode of action: (l) physical poisons, (2) protoplasmic poisons, (3) respiratory poisons, (4) nerve poisons, and (5) poisons of a more general nature.

Detailed explanation-4: -The production process of the insecticide comprises the steps of selecting raw materials, mixing and dissolving, preparing an emulsifier, emulsifying, removing smell, and shearing.