helps scientists understand processes in the natural world by providing simpler representations of those processes.

Types of scientific inquiry that biologist engage in that cannot be completely controlled

Food webs - transferring energy and matter from one level to another. here you see four food webs. one or more are incorrect. which food web(s) show the correct sequence of organisms, from start to top level consumer? a) a b) d c) c d) a and d

How can an organ, such as the lungs, work for multiple body systems?