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प्रश्न
Give reason to justify the following: The existence of decomposers is essential in a biosphere.
List two reasons to show that the existence of decomposers is essential in an ecosystem.
उत्तर १
Decomposers are the animals that break down dead plants and animals. They are essential for the proper functioning of an ecosystem. They help in the recycling of minerals by decomposing dead plants and animals and releasing their components into the environment.
उत्तर २
Decomposers include microorganisms such as bacteria and fungi that obtain nutrients by breaking down the remains of dead plants and animals.
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संबंधित प्रश्न
Which of the following are always at the second tropic level of food chains?
What is biological magnification?
Explain the terms 'producer' and 'consumer'. Give two examples of producers and two of consumers.
What is a 'food web'? Show its formation.
Some hunters are roaming in the plush green forest of Africa. They spot a deer and kill it. They decide to roast the deer there and then and eat it. When the hunters had just finished enjoying the feast of roasted deer, a lion attacks them. The lion kills one of the hunters and eats his flesh.
(a) write a food chain which provides food to lion in this case.
(b) Which animal (other than deer) the lion could look for food if he did not get the hunter as prey?
(c) Which other animal in the forest could have been in place of lion?
(d) How does the above food chain differ form the food chain such as : plants → goat → man?
Fill in the following blank with suitable word :
Pesticides enter the food chain at the ...........level
Explain why, a food chain usually cannot have more than three or four steps.
Which of the following limits the number of trophic levels in a food chain?
(a) insufficient food supply from producer level
(b) decrease in energy at higher trophic levels
(c) increase in the number of organisms at higher trophic levels
(d) accumulation of harmful chemicals at higher trophic levels
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?
In a food chain, the third trophic level is always occupied by
