Question

Which of the following could be considered a scientific principle?

A. Leaves bend toward the light because they know light is needed to grow.
B. Radioactive isotopes can be used as tracers in medicine because radioactive isotopes behave the same as other isotopes.
C. Biology is a more exact science than chemistry.
D. The height of Americans has been steadily increasing over the past 30 years.

Answer 1

The best example of a scientific principle is the use of radioactive isotopes as tracers in medicine.

Step-by-step explanation:

A scientific principle is a fundamental concept or idea that is supported by scientific evidence and has been consistently observed and tested. Among the options provided, the best example of a scientific principle is B. Radioactive isotopes can be used as tracers in medicine because radioactive isotopes behave the same as other isotopes.

Radioactive isotopes have specific properties and behaviors that allow them to be utilized as tracers in medical procedures, such as imaging and diagnosis. These isotopes can be tracked within the body to study different biological processes and identify various conditions or diseases. The use of radioactive isotopes as tracers is a well-established scientific principle based on extensive research and experimentation.