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Why Are There Rarely More than Five Links (Or Five Organisms) in a Food Chain? - Science

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प्रश्न

Why are there rarely more than five links (or five organisms) in a food chain?

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उत्तर

There are rarely more than five links (or five organisms) in a food chain because, according to the 10 per cent law, only 10 per cent of the available energy is transferred to the next trophic level. So, at the higher trophic levels, the amount of energy is reduced to such an extent that it becomes insufficient for an organism to sustain itself.

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पाठ 5: Our Environment - Exercise 2 [पृष्ठ २४०]

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लखमीर सिंह Biology (Science) [English] Class 10
पाठ 5 Our Environment
Exercise 2 | Q 13 | पृष्ठ २४०

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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?


"Energy flow in a food chain is unidirectional" Justify this statement.


Why are green plants called producers?


We do not clean natural ponds or lakes but an aquarium needs to be cleaned regularly. Why is it so ? Explain.


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


Name one decomposer.


What is the role of decomposers in the ecosystem?


Name two predators of snakes in a food web operating in a forest ecosystem.


What is ten per cent law? Explain with an example.


Explain how harmful chemicals enter our bodies.


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.

Write the food chain comprising all the organisms mentioned above.


Bacteria and fungi are called decomposers.


Food chains are very important for the survival of most species.

Matter and energy are two fundamental inputs of an ecosystem. Movement of:


______ obtained energy from the chemical breakdown of dead organisms.


The sequence of who eats whom in an ecosystem is called as ______.


The food chain begins with the energy given by the ______.


Animals that eat both plants and animals are called as Carnivores.


What is Autotrophs?


Define – Heterotrophs.


If a harmful chemical enters a food chain comprising peacocks, plants, rats and snakes, which of these organisms is likely to have the highest concentration of the chemical in its body? Justify your answer. Name the process involved and define it.


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