Hank gets into the dirty details about vascular plant reproduction: they use the basic alternation of generations developed by nonvascular plants 470 million years ago, but they've tricked it out so that it works a whole lot differently...

This lesson will discuss the interactions of and interdependence among living things. It is 4 of 4 in the series titled "Living Organisms and Their Environment."

This lesson explains the role plants play in the conversion of inorganic materials into organic material to support living things. It is 1 of 3 in the series titled "The Role of Plants in the Food Chain."