Toxins In The Environment

Question 1

Harmful substances

Answer 1

Pesticides
Radio active isotopes
Heavy metals
Industrial chemicals

Question 2

Bioaccumulation

Answer 2

Occurs when highly persistent pesticides, which cannot be metabolised or excreted, are stored and accumulate in the fatty tissues of the body. In an organism

Question 3

Biomagnification

Answer 3

Concentration of the pesticide increases as it moves up a trophic level