What is an indication that water is entering cells

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?

Si units are the modern form of the

If a young male's body is just beginning the process of producing sperm, when is it likely that he would ejaculate mature, viable sperm"