Assertion (A): Food web is a network of several food chains operating in an ecosystem.
Reason (R): Food web decreases the stability of an ecosystem.
Assertion (A): Food web is a network of several food chains operating in an ecosystem.
Reason (R): Food web decreases the stability of an ecosystem.
Show Hint
- Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
- Both Assertion (A) and Reason (R) are true and Reason (R) is not the correct explanation of Assertion (A).
- Assertion (A) is true, but Reason (R) is false.
Assertion (A) is false, but Reason (R) is true.
The Correct Option is C
Solution and Explanation
Step 1: Understanding Food Web. A food web is a network of interconnected food chains within an ecosystem, illustrating how different species are related through feeding.
Step 2: Analyzing Reason (R). Food webs actually increase the stability of an ecosystem by providing alternative pathways for energy flow, meaning that if one species declines, others can take its place.
Step 3: Conclusion. Since Assertion (A) is true but Reason (R) is false, the correct answer is option (C).
Top Questions on Ecosystem
We do not clean natural ponds or lakes, whereas an aquarium or a swimming pool needs to be cleaned regularly. Why?
Consider the following food chain: Grass → Grasshopper → Frog → Snake → Eagle If the amount of energy available at third trophic level is 50 kJ, the available energy at the producer level was:
- Why are restrictions imposed on MTP in India? Up to how many weeks or trimesters, is MTP considered relatively safe for a female, if necessary to perform, by a medical practitioner?
- Examples of physical factors or abiotic factors are:
- Percentage of fresh water on Earth is \_\_\_\_\_\_.
Questions Asked in CBSE X exam
Read the following source and answer the questions that follow:
Loans from Co-operatives
Besides banks, the other major source of cheap credit in rural areas are the co-operative societies. Members of a co-operative pool their resources for co-operation in certain areas. There are several types of co-operatives possible such as farmers co-operatives, weavers co-operatives, industrial workers co-operatives etc. Krishak Co-operative functions in a village not very far away from Sonpur. It has 2300 farmers as members. It accepts deposits from its members. With these deposits as collateral, the co-operative has obtained a large loan from the bank. These funds are used to provide loans to members. Once these loans are repaid, another round of lending can take place. Krishak Co-operative provides loans for the purchase of agricultural equipment, loans for cultivation and agricultural trade, fishery loans, loans for construction of houses and for variety of other expenses.- CBSE Class X - 2025
- Reading Comprehension
Read the following source and answer the questions that follow:
The Need for Political Parties
As we have seen, large societies need representative democracy. As societies became large and complex, they also needed some agency to gather different views on various issues and to present these to the government. They needed some ways, to bring various representatives together so that a responsible government could be formed. They needed a mechanism to support or restrain the government, make policies, justify or oppose them. Political parties fulfil these needs that every representative government has. We can say that parties are a necessary condition for a democracy.- CBSE Class X - 2025
- Reading Comprehension
Read the following source and answer the questions that follow:
The Independence Day Pledge, 26 January 1930
“We believe that it is the inalienable right of the Indian people, as of any other people, to have freedom and to enjoy the fruits of their toil and have the necessities of life, so that they may have full opportunities of growth. We also believe that if any government deprives people of these rights and oppresses them, the people have a further right to alter it or abolish it. The British Government in India has not only deprived the Indian
people of their freedom but based itself on the exploitation of the masses, and has ruined India economically, politically, culturally and spiritually. We believe, therefore, that India must sever the British connection and attain Purna Swaraj or Complete Independence.”- CBSE Class X - 2025
- Reading Comprehension
- Name the place where Mahatma Gandhi led the movement of cotton mill workers.
- CBSE Class X - 2025
- Nationalism in India
- Name an oil field of India located in the Arabian Sea.
- CBSE Class X - 2025
- Mineral and Energy Resources