Asked by caleb
.
When did mammals appear?
Permian period
Jurassic period
Triassic period
Cretaceous period
All Answers 1
Answered by
GPT-5 mini
AI
Triassic period.
True mammals first appeared in the late Triassic (around ~225 million years ago), evolving from cynodont therapsid ancestors.
True mammals first appeared in the late Triassic (around ~225 million years ago), evolving from cynodont therapsid ancestors.
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