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प्रश्न
What is biological magnification?
What is meant by biological magnification?
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उत्तर १
Biological magnification is defined as the phenomenon of the accumulation or increase in the concentration of some toxic substances at each trophic level.
उत्तर २
A progressive increase in the concentration of non-biodegradable substances in a food chain is called biological magnification.
उत्तर ३
The increase in the concentration of harmful substances, such as pesticides, in the bodies of living organisms at each level of a food chain is called biological magnification.
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संबंधित प्रश्न
List two main components of ecosystem?
We do not clean natural ponds or lakes but an aquarium needs to be cleaned regularly. Why is it so ? Explain.
Why are plants called producers?
Which of the following belong to the same trophic level?
Goat ; Spider ; Plants ; Hawk ; Rat
What is the role of decomposers in the ecosystem?
What will happen if we kill all the organisms in one trophic level?
At which trophic level a person is feeding when he is eating apple.
Give one example of a simple food chain.
What will happen if deer is missing in the food chain given below?
Grass → Deer → Tiger
A food chain occurring in the sea which provides food for many people can be written as :
phytoplankton → zooplankton → X → Y
What could be X?
A food chain occurring in the sea which provides food for many people can be written as :
phytoplankton → zooplankton → X → Y
Name the organism which Y could be.
If a harmful chemical enters a food chain comprising cat, mice and plants, which one of these organisms is likely to have the maximum concentration of the harmful chemical in its body?
Name two predators of snakes in a food web operating in a forest ecosystem.
With the help of a food chain, explain how biological magnification of harmful chemicals can occur.
Explain why, a food chain usually cannot have more than three or four steps.
Name and state the law given by Lindeman which tells us how much energy entering a particular trophic level of organisms is available for trasnsfer to the next higher trophic level.
In addition to wheat plants, a crop field ecosystem has organisms such as snake, peacock, eagle and mice. If the wheat plants are sprayed with pesticides periodically, which of the following will have the minimum concentration of pesticides in the body?
(a) snake
(b) eagle
(c) mice
(d) peacock
A food chain consists of fish, larvae, phytoplanktons and birds. The level of pesticides in water in which the fish, larvae and phytoplanktons live is quite high.
Write the food chain comprising all the organisms mentioned above.
Define – Heterotrophs.
Which group of organisms are not constituents of a food chain?
- Grass, lion, rabbit, wolf
- Plankton, man, fish, grasshopper
- Wolf, grass, snake, tiger
- Frog, snake, eagle, grass, grasshopper
