Unformatted text preview: What is the age and country of origin of the oldest known fossil snake? How many millions of years separate the youngest known dinosaurs from the oldest known hominids? Name one birdlike and one dinosaurlike characteristic of Archaeopteryx . What type of feathers was most likely found on Tyrranosaurus rex ? What is the age and country of origin of the oldest known fossil of a marsupial mammal? What is the age and country of origin of the oldest known fossil of a placental mammal? Which feature of the human embryo is reptilian, or found in pre-mammalian amniotes?...
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- Spring '09
- oldest known fossil, premammalian amniotes