CELL BIOLOGY A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z                    HOME ABOUT CATEGORIES SITE MAP COPYRIGHT ADVERTISE CONTACT entire Web this site proplastid An immature, colorless plastid. Proplastids occur in the cells of meristematic tissues. They consist of a double membrane enclosing granula stroma, multiply by division, and give rise in mature cells to leucoplasts or chromoplasts. Related category    • CELL BIOLOGY Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) BACK TO TOP