The opening of stomates is thought to involve a. an increase in the osmotic concentration of the guard cells. Water entering the vascular bundle of the root from the cortex must pass through the a. Casparian strip. George Washington completely removed the bark from around a cherry tree but was stopped by is father before cutting the tree down. It was noticed that the leaves retained their normal appearance for several weeks, but that the tree eventually died. Arrange the following five events in an order that explains the mass flow of materials in the phloem.
Water diffuses into the sieve elements.
Leaf cells produce sugar by photosynthesis. Solutes are actively transported into sieve elements. Sugar is transported from cell to cell in the leaf. Sugar moves down the stem. Photosynthesis begins to decline when leaves wilt because a. flaccid cells are incapable of photosynthesis.