Phanerozoic eon “Visible Life” Paleozoic Era: old life Mesozoic Era: middle life Cenozoic Era: recent life.
CHAPTER 4 Geologic Time. Review: What do fossils show about past environments? past life?
First true land dwellersFirst true land dwellers Lay eggs on land- internal fertilizationLay eggs on land- internal fertilization –Amniotic egg covered.
Chapter 41 Reptiles
