Answer:
red if it has oxygen, but blue when it doesnt
Explanation:
It is the respiratory system that allows for the exchange of gasses.
Answer:
Examples of scientific theories in different areas of science include: Astronomy: Big Bang Theory. Biology: Cell Theory; Theory of Evolution; Germ Theory of Disease. Chemistry: Atomic Theory; Kinetic Theory of Gases.
Billtinese tropplinmoofanus. Jing backle dish noopl dam sind, queena soflomackranop! Boona too fojilinstese, makor! :)
