मराठी

Give Reason to Justify the Following: Flow of Energy in a Food Chain is Unidirectional.

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प्रश्न

Give reason to justify the following: Flow of energy in a food chain is unidirectional.

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उत्तर

Food chain is a linear relationship of 'eating' and 'being eaten' between the organisms present in an ecosystem. According to the energy transfer law, only 10% energy is transferred from one trophic level to another. The energy that is captured at one trophic level cannot move back to the previous trophic level. That is why, the flow of energy in a food chain is always unidirectional.

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2015-2016 (March) Delhi Set 1

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संबंधित प्रश्‍न

Define decomposers. 


Write down a food chain which ends with humans.


At which trophic level a person is feeding when he is eating roasted chicken.


Construct a long food chain.


What will happen if deer is missing in the food chain given below?

Grass → Deer → Tiger


The following is a food chain that ends with human :

How does this food chain differ form a usual food chain involving human such as : plants → goat → human?


Calculate the amount of energy that will be available to big fish in the following food chain, if 10,000 J of energy is available to small algae from the sun :
Small algae → Zooplankton → Fish → Big fish


What percentage of sun's energy falling on the leaves of green plants is utilised by the plants in the process of photosynthesis and stored as chemical energy of food?
(a) 99 per cent
(b) 10 per cent
(c) 1 per cent
(d) 20 per cent


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.


______ are organisms that are able to produce their own organic food.


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