The Renaissance was an influential cultural movement which brought about a period of scientific revolution and artistic transformation, at the dawn of modern European history. It marks the transitional period between the end of the Middle Ages and the start of the Modern Age.
1 cell wall Outer structure which provides support and prevents the cell from bursting by the uptake of water by osmosis; plant, fungal and bacterial cell walls have different structures and chemical compositions.  chloroplast Contains the green pigment chlorophyll; the site of photosynthesis.
A second structure important to all plant cells is the central vacuole, which is a large storage compartment in plant cells. Both the cell wall and the central vacuole help plant cells regulate water movement, or osmosis, to keep plant cells strong enough to withstand a few days without water. wilting plant! Notice, however, that even in a hypertonic environment, the cell wall helps maintain the shape of the plant cell. As soon as you started watering the plant regularly, the plants were again in an isotonic, or equal, water environment.