Are reactants in the process of cell reception

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.

Talking listening and reacting non verbally are all part of communicating

The cluster of developing cells from conception until birth is called an