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प्रश्न
List two important roles play in the environment by decomposers.
What is the role of decomposers in the ecosystem?
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उत्तर १
Role of decomposers:-
They recycle matter by breaking down the organic remains and waste products of plants and animals. These recycled matter are washed up and enter the soil from where plants absorb the nutrients again.
It also converts the waste matter back to unstable form.
उत्तर २
Various role played by decomposers in the ecosystem are:
- They clean the environment.
- They decompose biodegradable substances into useful substances.
- They release nutrients into soil by decomposing dead and decaying matter, thus making the soil fertile.
- They maintain the nutrient pool by returning back the nutrients in the pool.
उत्तर ३
Decomposers are microorganisms that act on dead and decaying bodies of producers and consumers and break them into simple inorganic compounds. They absorb some of the substances and release the rest into the environment to be recycled and to be used in future by producers. Thus, decomposers have a key role in the cycling of material in the biosphere and provide the raw materials to the producers. So in this way they make the soil fertile.
संबंधित प्रश्न
In the following food chain, plants provide 500 J of energy to rats. How much energy will be available to hawks from snakes?
Plants → Rats → Snakes → Hawks
What name has been given to those organisms which break down the complex organic compounds present in dead animals and plants?
The following statement is true or false :
In biology, human beings are called producers.
Which category of organisms forms the starting point of a food chain?
Name one decomposer.
Write one or two word for the following statement/definition :
Each level of food chain where transfer of energy takes place
What will happen if deer is missing in the food chain given below?
Grass → Deer → Tiger
Organisms which synthesise carbohydrates from inorganic compounds by using radiant energy are called ______.
Which of the following statement is incorrect?
The sea water contains water beetles, tadpole, fish and weeds.
Write a food chain comprising all the given organisms.
If 5 joules of energy is available at producer level (plants), then how much energy will be transferred to the lion in the following food chain?
Plants → Goat → Lion
With the help of a food chain, explain how biological magnification of harmful chemicals can occur.
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
In the food chain given below, if the amount of energy available at fourth trophic level is 5 kJ, what was the energy available at the producer level?
Grass → Grasshopper → Frog → Snake → Hawk
(a) 500 kJ
(b) 50 kJ
(c) 5000 kJ
(d) 5 kJ
What are decomposers? What will be the consequence if the decomposers are completely eradicated from an ecosystem? Give justification in support of your answer.
Give one example of a food chain in an aquatic ecosystem?
Which of the following is an autotroph?
The food chain begins with the energy given by the ______.
Define – Heterotrophs.
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
