Ontario Grade 9 Science Class Practice Exam

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What is Ecology?

  1. A system of interlocking and interdependent food chains.

  2. A biological community of interacting organisms and their physical environment.

  3. Space and all the matter and energy in it

  4. Scientific study of interactions among organisms and between organisms and their environment

The correct answer is: Scientific study of interactions among organisms and between organisms and their environment

Ecology is defined as the scientific study of interactions among organisms and between organisms and their environment. Option A may seem correct at first because food chains are a part of ecology, but it is not a comprehensive definition of the field. Option B is similar to the correct answer, but it does not mention the scientific aspect of ecology. Option C is a definition of the concept of the universe, but it does not specifically pertain to ecology. Therefore, option D is the most accurate and complete definition of ecology.

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