Are Mammut mastodons the same species as Paleomastodons?

If someone could do the first couple, just so i can see how it's done that would be great! 20 points. complete a dichotomous key for the 10 leaves on the common leaves sheet. the chart provided here allows for 11 pairs of statements. depending on how you build your dichotomous key, you may or may not need all of them, or you may need to add some.

Explain how scientists use geologic time to determine the age of landforms.

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above