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प्रश्न
Write the percentage of energy transferred from autotrophs to the next level in a food chain.
What percentage of energy available at the producer level is transferred at successive trophic levels in a food chain?
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उत्तर
On average, only about 10 percent of energy stored as biomass in a trophic level is passed from one level to the next. This is known as "10 percent rule" and it limits the number of trophic levels an ecosystem can support.
संबंधित प्रश्न
What will be the amount of energy available to the organisms of the 2nd trophic level of a food chain if the energy available at the first trophic level is 10,000 joules?
"Our food grains such as wheat and rice, the vegetables and fruits and even meat are found to contain varying amounts of pesticide residues." State the reason to explain how and why it happens?
Will the impact of removing all the organisms in a trophic level be different for different trophic levels? Can the organisms of any trophic level be removed without causing any damage to the ecosystem?
The following statement is true or false :
In biology, human beings are called producers.
At which trophic level a person is feeding when he is eating eggs.
What is a 'food web'? Show its formation.
The decomposers in an ecosystem ______.
The sea water contains water beetles, tadpole, fish and weeds.
Which organisms can trap solar energy to make food?
What would happen to the number of grass plants and foxes if the number of rabbits decreased?
Match the terms given in column I with the terms given in column II and column III having the same meaning :
| Column I | Column II | Column III |
| (1) Secondary consumer | Herbivore | 1st trophic level |
| (2) Primary consume | Autotroph | 3rd trophic level |
| (3) Producer | Carnivore | 4th trophic level |
| (4) Tertiary consumer | Large carnivore | 2nd trophic level |
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 :
Lettuce → ............. → Fox
Which common pesticide has accumulated in human body in considerable amounts?
Most of the water surface of a lake is covered with algae. This algae is part of the food chain which also includes small fish, bird, larvae and big fish. Which of the following will obtain the maximum energy?
(a) big fish
(b) bird
(c) larvae
(d) small fish
Arrange the following in a correct sequence and form a food chain
Human → Insect → Algae → Fish
Write the importance of the food chain.
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 ______.
______ obtained energy from the chemical breakdown of dead organisms.
