Ontario Grade 9 Science Class Practice Exam

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What are pests?

A type of small mammal.
Beneficial insects that pollinate plants.
Organisms that are interfering with human goals.
Species that are protected by environmental laws.

The correct answer is: Organisms that are interfering with human goals.

Pests are not a type of small mammal (A), which is a broader classification for larger animals. They are also not beneficial insects that pollinate plants (B), as these insects are helpful and generally not considered pests. Species that are protected by environmental laws (D) tend to be threatened or endangered species, which are not considered pests. The correct definition for pests are organisms that are interfering with human goals (C), meaning that they cause harm, damage or nuisance to humans, their food, crops, buildings or other possessions. By definition, pests are considered negative and harmful, which is why C is the correct answer.