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प्रश्न
In the following food chain, 100 J of energy is available to the lion. How much energy was available to the producer?
Plants → Deer → Lion
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उत्तर
Plants → Deer → Lion
It is given that 100 J of energy is available to lion.
Let the amount of enrgy available to deer be x Joules.
According to 10% law, only 10% energy from deer must have been transfered to lion so, energy available to deer can be calculated as,
⇒ 10% of x = 100 J
⇒ `10/100xxx=100 J`
`therefore x=100J`
∴ Energy available to the deer = 1000 J
Let the energy available to the producer be y J.
By problem,
⇒ 10% of y = 1000 J
⇒ `10/100xxy =1000J`
⇒ y = 10,000 J.
So we have found that energy available to producer is 10,000J.
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संबंधित प्रश्न
List two important roles play in the environment by decomposers.
What is meant by a primary consumer, secondary consumer and a tertiary consumer? Give one example of each.
One of the following is not a consumer. This one is :
(a) giraffe
(b) antelope
(c) algae
(d) alligator
In a food chain consisting of grass, frog, bird and insects, where will the concentration of the harmful chemicals be maximum?
What is ten per cent law? Explain with an example.
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 forest ecosystem having a lot of green plants has some foxes, lions and rabbits in it.
(a) Write a food chain comprising all the four organisms mentioned above.
(b) Name (i) one herbivore, and (ii) two carnivores, in this food chain.
(c) Name the link which is a predator as well as a prey.
(d) Name (i) second trophic level, and (ii) third trophic level.
(e) Which link of this food chain can feed on second trophic level as well as third trophic level, independently?
(f) If the sun provides 1000 J of energy to the plants, then how much energy will be transferred to fox through the food chain.
If 100 J energy is available at the producer level in a food chain then the energy available to the secondary consumer will be ______.
Analogy:
Primary Consumer: Goat, Cow:: Secondary Consumer: ______.
Assertion (A): The energy which passes to the herbivores does not come back to autotrophs.
Reason (R): The flow of energy in a food chain is unidirectional.
