Equilibrium is best defined as a state of what?

What heat is removed how does a gas become a liquid

Explain how sequences of amino acids in proteins can be used to reveal relationships among organisms.

Asquirrel population lives in an area. over many years, a river in that area grows wider and stronger, eventually forming a canyon. the squirrel populations on the two sides of the canyon can no longer mate with each other and ultimately form distinct species. this is an example of