Exchange of nutrients occurs in the digestive system. Exchange of oxygen occurs in lungs
Answer:
Positive charge. They are the opposite of electrons.
DNA, also known as deoxyribonucleic acid, is the molecule that contains the genetic code of organisms; a genetic code that determines all the characteristics of a living thing.
Well, I'm assuming you're talking about these terms...
Species, Genus, Family, Order, Class, Phylum, Kingdom, Domain
A good way to remember this is;
Does King Philip Come Over For Great Spaghetti
(However, this is in order from most specific to least specific)