Plants use and produce both oxygen and carbon dioxide.
UV rays reacting with the O2 molecules
I might be wrong a little but
Hope the helps :)
They replicate fast - producing more of the useful proteins such as the hormone insulin.
Answer: "Constrictive" pyramid
[ I hope my answer is correct]
Blood is pushed through the organism by the heart, and brings nutrients and oxygen to our tissues. It also takes away waste and carbon dioxide from tissues.