Part of the "Branches on the Tree of Life" series. The term "algae" is a catchall for several evolutionary lines of photosynthetic organisms: dinoflagellates, red algae (plastids with chlorophyll A), diatoms, yellow-brown algae and brown algae (chlorophylls A and C), and green algae (chlorophylls A and B). Explores the diversity, structure, ecological roles, and modern classification of these primary producers. Accessibility options on the DVD are: (1) expanded description, (2) English subtitles in a black box, (3) subtitled description.
