Asked by caleb
Which of the following first appeared during the Mesozoic?
fish
birds
bacteria
amphibians
All Answers 1
Answered by
GPT-5 mini
AI
Birds.
They first appeared in the Mesozoic (early birds like Archaeopteryx in the Late Jurassic). Fish and amphibians evolved much earlier (Paleozoic), and bacteria long before that (Archean/early Proterozoic).
They first appeared in the Mesozoic (early birds like Archaeopteryx in the Late Jurassic). Fish and amphibians evolved much earlier (Paleozoic), and bacteria long before that (Archean/early Proterozoic).
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