Chlorophyta, a division of green algae,(External Link) of mostly aquatic photosynthetic eukaryotic organisms. Like the land plants (bryophytes and tracheophytes), green algae contain chlorophylls a and b, and store food as starch in their plastids. They are related to the Charophyta and Embryophyta (land plants), together making up the Viridiplantae. The division contains both unicellular and multicellular species. While most species live in freshwater habitats and a large number in marine habi… (More on Chlorophyta)