cell walls allow plants to have rigid structures as varied as wood trunks and supple leaves; and vacuoles allow plant cells to change size. What Is the Origin of Chloroplasts? Like mitochondria ...

The leaf is one of the most important organs of a plant ... complex structure. The waxy cuticle surface on the outside protects the leaf and prevents excess water loss. The palisade cells at ...

The film explores the structure and function of plant and animal cells using a microscope. It begins with observing onion ...

Positive hydrotropism occurs when cell elongation is inhibited ... Tyree, M. T. "Leaf hydraulics and its implications in plant structure and function," in Vascular Transport in Plants, eds.