Phycology

thumb|250px|Kelp in Hazards Bay, Freycinet National Park, Tasmania, Australia

substance produced by life processes; it may be either constituents, or secretions, of plants or animals

thumb|Diagram of a four membraned plastid containing a nucleomorph Nucleomorphs are small, vestigial eukaryotic nuclei found between the inner and outer pairs of membranes in certain plastids. They are thought to be vestiges of red and green algal nuclei that were engulfed by a larger eukaryote. Because the nucleomorph lies between two sets of membranes, nucleomorphs support the endosymbiotic theory and are evidence that the plastids containing them are complex plastids. Having two sets of membranes indicate that the plastid, a prokaryote, was engulfed by a eukaryote, an alga, which was then e