What type of compound will form between the two atoms shown

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.

What would happen to the nutrients in an ecosystem if decomposers, such as bacteria, didn’t exist there?

According to the cladogram, which organisms have roundworms as a common ancestor?