Wyoming Pesticide Applicator Certification Practice Test

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What is biomagnification?

  1. The breakdown of toxic substances

  2. The elimination of toxins by organisms

  3. The concentration of toxins in an organism due to ingesting organisms with more widely dispersed toxins

  4. The dispersion of toxins in the environment

The correct answer is: The concentration of toxins in an organism due to ingesting organisms with more widely dispersed toxins

Biomagnification is the process by which toxins become more concentrated in organisms as they move up the food chain. This occurs because as predators consume prey, they also consume the toxins present in the prey's body. Since these toxins cannot be broken down or eliminated by the predator's body, they become more concentrated over time. Option A is incorrect because biomagnification does not involve the breakdown of toxins, but rather the accumulation of them. Option B is incorrect because biomagnification does not involve the elimination of toxins, but rather their accumulation. Option D is incorrect because biomagnification refers to the concentration of toxins within organisms, and not their dispersion in the environment.

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