What is not a characteristic of life? •obtaining and using energy
•maintaining homesostasis
•having cells
•movement

Eristics do scientists use to distinguish between organisms in different kingdoms

The oxidizing agent our bodies use to obtain energy from food is oxygen (from the air). if you breathe 15 times a minute (at rest), taking in and exhaling 0.5 l of air with each breath, what volume of air do you breathe each day? air is 21% oxygen by volume. what volume of oxygen do you breathe each day?

Works together in the synthesis, modification, packaging, and transport of lipids and proteins