explain how the changes seen in the petri dish (effectiveness of handwashing experiment - regular soap handwashing is better) support the statement that cells are the building blocks of life?

Asnail, elodea (aquatic plant), or both were added to the tubes and they were stoppered. tubes were placed under a grow light for 24 hours and the results recorded. the test tubes were then covered for 24 hours to produce a dark environment and the results recorded. which statement best explains the change in test tube d from the light setup to the dark setup.

The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks