In particular, organelles called chloroplasts allow plants to capture the energy of the Sun in energy-rich molecules; cell walls allow plants to have rigid structures as varied as wood trunks and ...

Plant cells have a rigid cell structure. They are made up of a cell wall, cell membrane, cytoplasm, vacuole, nucleus, and chloroplasts. Plants feel firm because of their cellular walls.

If this influx of water is uncontrolled, the cell may eventually burst. Most bacteria, algae and fungi have rigid cell walls that allow them to tolerate and even enjoy a somewhat hypotonic environment ...