A. Dinosaurs - lived on land

1. classification (fig. 22.23)
1. saurischian - lizard hips
• theropods - carnivores
• sauropods - extremely large
2. ornithischian - bird hips
• stegosaurs
• ankylosaurs
• ceratopsians
• ornithopods
• pachycephalosaurs
2. warm vs. cold blooded
1. cold blooded
• lizard-like
• BIG - eat too much if warm blooded
• BIG - helps control temperature
• thermal regulating devices
2.  warm blooded
• social and protect young
• feather on Archeopteryx
• predator/prey ratio
• speed calculated from tracks
• bird ancestors

B. Other reptiles

1. flying - pterosaurs (fig. 23.25)
2. swimming (fig. 23.26)
1. ichthyosaur
2. plesiosaur

C.  Mammals

1. warm-blooded
2. mostly placentals (some marsupials and monotremes)
3. mammary glands
4. differentiated teeth

D. Plants -

1. seedless vascular plants (Sil.? to present)
1. fern-like
2. need water to reproduce
2. gymnosperms (Miss. to present)
1. cones
2. not dependent on water for reproduction
3. angiosperms (Cretaceous to present)
1. flowering plants
2. flowers increase pollination
3. enclosed seed

E. Cretaceous extinction

1. climate change
2. meteoerite impact
1. iridium anomaly
2. Chicxulub
3. methane or carbon dioxide
4. many mini-extinctions

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