Bio1100
Chapter 20
History of the Vertebrates
Vertebrates
possess
vertebrae
and evolved from an ancestor that had a
notochord
.
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Important evolutionary adaptations in
fish
include
legs
and
jaws
.
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Terrestrial vertebrates develop from
amniotic
eggs
that can be laid on dry land.
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Mammals
produce
milk
to nourish their young.
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