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प्रश्न
What is meant by bioconcentration of pesticides
उत्तर
The increase in the concentration of harmful chemical substances, such as pesticides, in the body of living organisms at each trophic level of a food chain is called bioconcentration of pesticides.
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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.
Write down a food chain which ends with humans.
Construct a short foodchain, ending with man.
In a food chain, the third trophic level is always occupied by :
(a) carnivores
(b) herbivores
(c) decomposers
(d) producers
Write the percentage of energy transferred from autotrophs to the next level in a food chain.
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.
'If we excessively use pesticides to protect the crops from diseases, then it may cause long-term damage to mankind'. Justify this statement.
If the energy available at the producer level in a food chain is 150 J, how much energy will be transferred to : tertiary consumer?
(a) 15 J
(b) 10 J
(c) 1.50 J
(d) 0.15 J
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
