What are the phases of a scientific method?

Which element provides strength to the exoskeleton of clams and oysters

Select the correct answer from each drop-down menu. during the day, plants produce by splitting water molecules in the light-dependent reactions of photosynthesis. at the same time, plants use cellular respiration to produce some of the needed by the light-independent reactions to make sugars. during the night, plants produce because takes place.

What is the process of pulling apart an n2 molecule nevermind i got it