Ontario Grade 9 Science Class Practice Exam 2026 – Your Complete Guide to Exam Success!

Question: 1 / 400

What describes a food chain?

A diagram that shows the energy flow between organisms

A system of interlocking and interdependent food chains.

An organism that makes its own food

Series of steps in an ecosystem in which organisms transfer energy by eating and being eaten

A food chain is a series of steps in an ecosystem in which organisms transfer energy by eating and being eaten. This explains the interdependence of different organisms in a particular ecosystem. Option A is incorrect because a food chain is not just a diagram but a real-life process in nature. Option B is incorrect because it describes a food web, which is a network of interconnected food chains. Option C is incorrect because it describes an autotroph, which is an organism that can produce its own food through photosynthesis or chemosynthesis. A food chain, on the other hand, involves both autotrophs and heterotrophs. Overall, option D best describes a food chain as it highlights the process and relationship between different organisms in an ecosystem.

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