Which of the following describes an in vivo experiment? A. observations are made in a buffered solution. B. Observations are made in Petri dish. C. Observations are made in a living mouse. D. Observations are made in a test tube.

Answer: C. Observations are made in a living mouse.

Explanation:

In-vivo experiment refers to the experimental procedure that occurs in the whole living organism or living cell. It involves the experiment in a natural biological environment. The observations are made in living mouse is the correct option because it involves the whole living organism that is mice.

C. Observations are made in a living mouse

An in vivo experiment consists on conducting the study in a whole living organism, in this case, a mouse