Characters unique to each group (autapomorphies), not shared with the others

CICHLID -

symmetrical tail fin, spiny fins.

FROG -

long sticky tongue, tadpole.

TURTLE -

shell covering body, no teeth.

KANGAROO -

big grinding teeth, thick tail.

MOUSE -

ever-growing incisors.

HUMAN -

opposable thumb, reduced toes, huge brain.

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Return To Lecture 5

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