Save guides, add subjects and pick up where you left off with your BBC account. Six-mark questions are often the questions that people find the most difficult. In all longer-answer questions, but ...

Explanation: The study of food chains helps in understanding the feeding relations and interactions among different organisms in ecosystem. It explains flow of energy and circulation of materials ...

then we will be providing the questions with answers and that too chapter-wise. Here, we provide the CBSE Class 12 Biology Chapter 3 Ecosystem competency-based questions for the 2025 examination.

Linking questions span different topics. In linking questions, it is important that you plan your answer and not just rush into it. After all, you would plan an essay or short story before starting.

Explanation: Ecosystems dependent on solar radiation and energy subsidies such as wind, rain, and tides are Tropical rain forest, Tidal estuaries, and Coral reefs.