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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
The following statement is true or false :
In biology, human beings are called producers.
Which of the following belong to the same trophic level?
Goat ; Spider ; Plants ; Hawk ; Rat
Name one decomposer.
Write down a food chain in the sea.
Which of the following represents a possible food chain found in a pond :
| Primary producers |
Primary consumers | Secondary consumers |
| (a) green algae | fish | mosquito larvae |
| (b) fish | green algae | mosquito larvae |
| (c) mosquito larvae | fish | green algae |
| (d) green algae | mosquito larvae | fish |
What will happen if deer is missing in the food chain given below?
Grass → Deer → Tiger
The sea water contains water beetles, tadpole, fish and weeds.
Which organisms in the food chain are herbivore, and carnivores?
The following is a food chain that ends with human :
Do you think that the food chain given in this question can really be regarded as a food chain? Explain your answer.
A food chain occurring in the sea which provides food for many people can be written as :
phytoplankton → zooplankton → X → Y
Name one phytoplankton.
The following statement is true or false :
Only 10 per cent of the light energy given by the sun is available for transfer at each higher trophic level in a food chain.
Fill in the following blank with suitable word :
Pesticides enter the food chain at the ...........level
Fill in the following blank with suitable word :
Lettuce → ............. → Fox
What is meant by bioconcentration of pesticides
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.
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.
Write the importance of the food chain.
Green plants utilize ______ percent of sun’s energy to prepare their food by the process of photosynthesis.
In an ecosystem, herbivores represent ______.
Each level in the food chain is called a ______ level.
