Question

You are an aquatic biologist studying a small lake. The stream that drains into this lake runs by croplands. You are detecting a pesticide called atrazine in the insects and worms that live in the lake. The predatory birds such as herons and egrets have very high concentrations of atrazine in their blood. The birds prey on the frogs and small fish. What condition best explains the high atrazine level in the birds?

Answer 1

Feeding on the worms with concentration of atrazine in their system

Answer 2

The condition best explains the high atrazine level in the birds is biological magnification. The correct option is D.

What is biological magnification?

Biological magnification is the occurrence of any chemical in the body of a living organism than in outer space or the environment. The chemicals can be toxins or pesticides. They are present within the tolerant level in the tissue.

Here, the atrazine level is high in frogs and small fish than in the surrounding water, which is going in birds.

Thus, option D. biological magnification is correct.

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Learn more about biological magnification, here:

https://brainly.com/question/14315613

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