How many different types of tissue cells are there in humans? A. 200 B. 20 C. 2,000 D. 20,000

Me with biology endocrine system crossword also image left i need with hw

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?

The human body needs energy in order to carry out life processes such as breathing. where does the body get this energy? a. from eating food b. from learning about new things c. from lying in the sun d. from sleeping