The region of the brain that plays a role in breathing/respiration

Organisms are classified, or grouped into categories, based on similarities in their characteristics and/or evolutionary relationships. the study of how organisms are classified is known as

What the theory that the sun goes around earth was replaced with the theory that earth goes around the sun this was an exaple of a

When listening the levels of orginization in orginisims from the smallest to most complex , which level is just below organs in complexity