Final answer:
The first bacteria did not appear during the Mesozoic era, which was characterized by the dominance of dinosaurs, evolution of birds, and appearance of gymnosperms.
Explanation:
The first bacteria appeared did not occur during the Mesozoic era. The Mesozoic era was marked by the appearance of dinosaurs, evolution of birds, and the dominance of gymnosperms.
Learn more about Mesozoic Era events here:
https://brainly.com/question/2516602
