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प्रश्न
A farmer was using pesticides on his farm. He used the produce of his farm as food for rearing fishes. He was told that fishes were not fit for human consumption because large amount of pesticides had accumulated in the tissues of fishes. Explain how did this happen?
उत्तर
Pesticides can be defined as the synthetic toxic chemicals which are meant to kill pests. Most of the organic toxins are water-insoluble and non-biodegradable in nature. These high persistent toxins are transferred from lower trophic level to the higher trophic level through the food chain. Over time, the concentration of toxins in higher animals reaches a level which merely causes serious metabolic and physiological disorders.
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संबंधित प्रश्न
What is degradable pollutants?
Which one of the following diseases is caused by water pollution?
Describe the major source of air pollution.
Name the anthropogenic sources of water pollution.
Which of the following naturàl activities is responsible for air pollution?
Biochemical Oxygen Demand, (BOD) is a measure of organic material present in water. BOD value less than 5 ppm indicates a water sample to be ______.
Dinitrogen and dioxygen are main constituents of air but these do not react with each other to form oxides of nitrogen because ______.
Which of the following conditions shows the polluted environment.
(i) pH of rain water is 5.6.
(ii) amount of carbondioxide in the atmosphere is 0.03%.
(iii) biochemical oxygen demand 10 ppm.
(iv) eutrophication.
The consequences of global warming may be:
(i) increase in average temperature of the earth.
(ii) melting of Himalayan Glaciers.
(iii) increased biochemical oxygen demand.
(iv) eutrophication.
Which in wrong with respect to our responsibility as a human being to protect our environment?
