1.What two events set eras?

2.What existed over most prairies?

Please help.

I meant what existed over most prairies in the mesozoic era.

dinosaurs?

Thank you for using the Jiskha Homework Help Forum. Hopefully, this site will help you:

http://www.britannica.com/eb/article-69925/Mesozoic-Era

1. Two events that set eras are major geological or biological changes on Earth. These events leave distinct marks in the geological record, allowing scientists to divide Earth's history into different eras. For example, the extinction of the dinosaurs marked the end of the Mesozoic Era and the beginning of the Cenozoic Era. Another event that set eras is the formation of major mountain ranges, such as the Himalayas, which marked the beginning of the Cenozoic Era.

To find more specific information on the events that set eras, you can consult various sources such as textbooks, encyclopedias, or reliable websites. One resource you can use is Britannica's article on the Mesozoic Era, which provides a detailed overview of the era and the events that defined it. You can access the article through the Britannica website or other reliable online sources.

2. In the Mesozoic Era, dinosaurs did indeed exist and were one of the dominant forms of life. They inhabited various environments, including prairies. However, it is important to note that prairies, as we understand them today, did not exist during the Mesozoic Era. Instead, the landscape was characterized by a mix of different ecosystems, including forests, swamps, and open plains.

To learn more about the Mesozoic Era and the specific environments that existed over most prairies during that time, you can research scientific articles, textbooks, or reliable online sources. The article on the Mesozoic Era from Britannica that I mentioned earlier could provide you with a starting point for your research. Additionally, you can also explore academic databases or consult paleontologists' research to learn more about the specific ecosystems and life forms during the Mesozoic Era.