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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
Which of the following are always at the second tropic level of food chains?
What will happen if we kill all the organisms in one trophic level?
In the following food chain, 20,000 J of energy was available to the plants. How much energy would be available to man in this chain?
Plants → Sheep → Man
Why are plants called producers?
Fill in the following blank with suitable word :
Decomposer organisms are..........in their action.
At which trophic level a person is feeding when he is eating eggs.
Write one or two word for the following statement/definition :
Each level of food chain where transfer of energy takes place
What is a 'food web'? Show its formation.
If a grasshopper is eaten by a frog, then the energy transfer will be from ______.
Name two predators of snakes in a food web operating in a forest ecosystem.
Fill in the following blank with suitable word :
Lettuce → ............. → Fox
What is ten per cent law? Explain with an example.
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
The surface of water in a lake appears green due to a layer of tiny free-floating organisms X on its surface. The lake water also contains organisms like water beetle, fish and tadpole. The sun shines over the lake water and provides energy for the functioning of this lake ecosystem.
(a) What could organisms X be?
(b) Write a food chain comprising of all the four organisms mentioned.
(c) What is the general name of the food chains like the one written above?
(d) Name (i) secondary consumer (ii) producer (iii) tertiary consumer, and (iv) primary consumer, in the above food chain.
(e) If the tertiary consumer gets 0.2 J of energy from the secondary consumer, then how much energy was radiated by the sun to the producer?
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.
(a) In which organisms the pesticides enter from the polluted water? What is this level of organisms known as?
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.
Which organism will have the maximum amount of pesticides accumulated through the food chain? What is this process known as?
We should reduce the use of the plastic bags, bottles etc. because ______.
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 ______.
Differentiate between herbivores and carnivores.
In the following food chain, vertical arrows indicate the energy lost to the environment and horizontal arrows indicate energy transferred to the next trophic level. Which one of the three vertical arrows (A, C and E) and which one of the two horizontal arrows (B and D) will represent more energy transfer? Give reason for your answer.
A food chain in a forest ecosystem
