Crash Course
The Sex Lives of Nonvascular Plants: Alternation of Generations
Plants evolved more than 400 million years ago into two types — vascular and nonvascular. Here's a video that explains the difference between vascular and nonvascular plants and then focuses on the over 24,000 types of nonvascular...
Crash Course
Vascular Plants = Winning!
Viewers explore vascular plants with a video that shows their different tissues, their ability to grow taller and wider, and their parts. Young scientists then see these plants xylem and phloem and learn how vascular plants move water...