Which best describes the bond shown

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

The ancestors of plants that lived in water had plenty of water for the young. angiosperms are a group of land plants that evolved a reproductive trait for living on land. this trait protect young plants by allowing them to grow only when water is present and the conditions for healthy development are right. what trait most likely young angiosperms in this way?

During the process of blank and molecules such as a glucose must use a protein channel to cross through a cell membrane