What is the nature of the fungal-plant mutualism mentioned in the text? bio 180?

The process by which natural forces move weathered rock and soil brim one place to another is called

What function does the limb sever in each animal? how are the limb bones of the four animals similar? based on these similarities what can be inferred about the evolution of the four animals.

Has anyone taken the genetics unit test in connexus? not looking for answers, just a little bit what to expect and some with studying.