What role do plants play in the water cycle?

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

Grasses--> mice--> cats--> coyotes suppose 10,000 units of energy are available at the level of the grasses. what is the total number of energy units lost by the time energy reaches the coyote?

All phases of matter may have a fixed mass