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प्रश्न
Explain how the pesticides enter a food chain and subsequently get into our body.
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उत्तर १
A large number of pesticides and chemicals are used to protect our crops from pests and diseases. Some of these chemicals are washed down from the soil, while some enter the water bodies. From the soil, they are absorbed by plants along with water and minerals; and from the water bodies, they are taken up by aquatic plants and animals. This is how these chemicals enter the food chain. As these chemicals cannot decompose, they accumulate progressively at each trophic level. This increase in the concentration of harmful chemicals with each step of the food chain is called biomagnification. As human beings occupy the top level in any food chain, these chemicals get accumulated in our bodies.
उत्तर २
Pesticides are non-biodegradable wastes which pass along the food chain from crops to man or other animals and birds and harm them.
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संबंधित प्रश्न
What name has been given to those organisms which break down the complex organic compounds present in dead animals and plants?
Fill in the following blank with suitable word :
In nature, all green plants are............ whereas animals are consumers.
What is a trophic level?
A food chain occurring in the sea which provides food for many people can be written as :
phytoplankton → zooplankton → X → Y
Name one phytoplankton.
What would happen to the number of grass plants and foxes if the number of rabbits decreased?
Fill in the following blank with suitable word :
Plants → Antelope → ............
Explain how harmful chemicals enter our bodies.
The ten per cent law is associated with
(a) transfer of energy from various trophic levels to decomposers in a food chain
(b) transfer of ATP energy into muscular energy
(c) transfer of chemical energy from one organism to another
(d) transfer of sun's energy to the organisms called producers.
Give some examples for Biodegradable and Non-biodegradable waste.
| S. No. | Biodegradable waste | Non-biodegradable waste |
| 1. | Food Waste | Plastic Bottles |
| 2. | ||
| 3. | ||
| 4. | ||
| 5. |
The process of accumulation of harmful chemical substances like pesticides, in the body of living organisms at each trophic level of a food chain is known as ______.
