Ontario Grade 9 Science Class Practice Exam 2025 – Your Complete Guide to Exam Success!

Question: 1 / 400

What is a limiting factor in an ecosystem?

A nutrient that is overly abundant in an ecosystem.

A type of animal that dominates an ecosystem.

An environmental factor that prevents a population from increasing.

A limiting factor in an ecosystem refers to an environmental factor that restricts the growth or distribution of a population within that ecosystem. This can include factors such as food, water, shelter, and space. Options A, B, and D are incorrect because they do not accurately define a limiting factor. Option A talks about an abundant nutrient, but this does not necessarily restrict the growth of a population. Option B mentions a dominant animal, which also does not necessarily limit the growth of other populations. Option D refers to a factor that increases biodiversity, but this does not necessarily limit the growth of a specific population. Therefore, the correct answer is option C, as it accurately describes the definition of a limiting factor.

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A factor that increases biodiversity.

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