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 ...

Two studies published in the latest issue of Science, led by Dr. Fernando García-Moreno, Ikerbasque researcher at the ...

Channels in plant cell walls, called plasmodesmata ... two proteins that help form tube-like endoplasmic membrane in mammalian cells. "We showed that these proteins are similar to the highly ...