Description: A core adaptation to life on land is "Amniotic fertilization" — the internalization of a moist environment so that gametes can meet and perpetuate the species. This is easy to describe to students: They are amniotes. But internal fertilization also occurs in seeds that invented it 50 million years before it was a gleam in some amorous amphibian's eye. While the origin of the seed is intimately associated with the "confusing" alternation of generations, we can untangle the confusion to recognize that perhaps all amniotes should really be called "gymnozoans."
