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Lesson 2

What characteristic did
many dinosaurs share with
today's lizards?

They have four legs.

How are babies of reptiles
different than babies of

Reptiles develop in eggs.

What does a vertebrate
have that an invertebrate
does not have?


How are amphibians
different from all other
classes of vertebrates?

Adult amphibians look
nothing like their babies.

List the characteristics of

Not born from eggs.
Hair or fur
Look like their parents
at birth
Mothers feed their
young milk

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