Warm Up 1/15/08 1. 1.The most common Precambrian fossils are layered mounds of calcium carbonate called ____. a. prokaryotesc. stromatolites b. trilobitesd.
An Introduction to Vertebrate Animals. Introduction most familiar to us Chordates (vertebrates) are the group of animals most familiar to us Ex: Ex: mammals,
Chordates: Phylum Chordata
