"The mouth" is the correct answer
Answer:
well you either have eukaryotic or prokaryotes : Eukaryotic being us humans (the one special thing we have in are cells to function is a Nucleus, which holds genetic material), and then Prokaryotic which just dont have a Nucleus
Complex carbohydrates
Such as insoluble fiber. Your body will break that down first because I is much faster than other source to convert to energy. If there isn't any carbs available your body will then convert fat into energy and lastly if there is t and carbs or fat your body will then breakdown protien into energy but that is truly the last resort. Sorry for the errors in this texts I was writing very fast and my phone will not allow me to edit.
Answer:
Earth's atmosphere is roughly 78 percent nitrogen and 21 percent oxygen, with trace amounts of water, argon, carbon dioxide and other gases. Nowhere else in the solar system is there an atmosphere loaded with free oxygen, which is vital to one of the other unique features of Earth: life
