Which is the best definition of a phylogenetic tree?

When analyzing tree rings, what do scientists assume a thin ring indicates?

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.

List five ways we are indebted to phytoplankton