Witch one would it be

A. Pick up the shattered glass

B. Clean the substance with a paper towel

C. Inform her teacher or lab instructor

D. Ask her lab partner to clean it up

The answer to your question is the letter C.

Explanation:

As it is mentioned in the description, Megan does not know what substance is inside the pipette. If we do not know what substance is, the first thing that we must do is to inform the teacher of the lab assistance to support us because it  could be a dangerous substance that could harm us if we touch it.

Also, the teacher could inform us how to handle that substance because it could require a special handle before place it in the trash.

The answer is C.

photosynthesis makes the glucose that is used in cellular respiration to make atp. the glucose is then turned back into carbon dioxide, which is used in photosynthesis. while water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.