Final answer:
During the Paleozoic Era, significant changes like the formation of Pangaea and the evolution of animal phyla occurred.
Explanation:
The two important changes that occurred during the Paleozoic Era were:
- The formation of the supercontinent Pangaea.
- The diversification and evolution of many animal phyla.
These changes led to significant climatic shifts and the development of various life forms on Earth.
Learn more about Paleozoic Era changes here:
https://brainly.com/question/11936655
