During oxygen enters the blood and carbon dioxide leaves the blood, and enters the alveoli.

Modern whales developed their traits through natural selection what occurs during the process of natural selection

Dna. we have heard that we are a product of our dna. but where is it? how do we "get" our dna? it is passed to us, from our parents, but in what form? several vocabulary words associated with inheritance are used interchangeably and sometimes, incorrectly. let's see if you can clear this up for someone just learning about inheritance and cell structure.

What would happen if the tubing with the yellow band was placed in a beaker of distilled water?