Need help placing the rest of these plz.

What was the land like over 500 million years ago? what was under the sea?

What are the proteins in connectivity tissues of your foot examples of?

[34 points awarded to the best answer, use facts and/or data] 1.) what's the likelihood of thunderstorms occurring in the state of maryland? {this question is for a project for science, use facts and/or data and explain why . 34 points to the best answer]