A scientist suspects that food in an ecosystem may have been contaminated by radioactive nitrogen over a period of several months. Which of the following should be isolated from mammals living in the ecosystem and examined for radioactivity in order to test the hypothesis?

Question

Quizplus · Accepted Answer

Hair grows continuously, and therefore, it will show a record of exposure to radioactive isotopes over an extended period. This is unlike the other choices, which may not provide a clear record of exposure.

A Scientist Suspects That Food in an Ecosystem May Have