The elliptical shape of the earths orbit changes all the time

True or false

Which would prevent a plant from growing

And give a detailed description! scientist observes the boundary between two tectonic plates for a decade and finds that no new volcanoes have formed over the course of her investigation. does this result support the theory of plate tectonics? why or why not?

Apaleontologist finds a plant fossil that shows that the plant had seeds. what can the paleontologist conclude?