The vast world of plants includes everything from microscopic organisms to 300-foot-tall trees. Plants are crucial to our survival. If the plant life on our planet were to disappear, all living animals would not be able to exist. Learn all about chlorophyll, photosynthesis, unicellular algae and its evolution, mosses, ferns, conifers, flowering plants, and the characteristics and reproductive devices of plants. Discover some of the unique qualities of these amazing species.

Originally released by Cerebellum Corporation, 2013. Streaming video file encoded with permission for digital streaming by Infobase on July 10, 2018.

The World of Plants: Introduction (1:07); --The First Plants (2:14); -- Crossing to Land (3:35); -- Seeds (2:56); -- The World of Plants: Summary (2:17); -- Credits: The World of Plants (0:47); .