Chordates- mammals Have hair and feed their young milk Have hair and feed their young milk All are endoderms All are endoderms Most live on land, but bats fly and two groups, seals and whales are partly or fully aquatic Most live on land, but bats fly and two groups, seals and whales are partly or fully aquatic 3 major groups 3 major groups Monotremes- (platypus) lay eggs Monotremes- (platypus) lay eggs Marsupials – (possums, koalas, kangaroos)- give birth to immarture young that develop in a pouch Marsupials – (possums, koalas, kangaroos)- give birth to immarture young that develop in a pouch Placentals- give birth to more mature live young Placentals- give birth to more mature live young
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