Answer:
four oxygen molecules
Explanation:
The hemoglobin molecule has four binding sites for oxygen molecules: the iron atoms in the four heme groups. Thus, each Hb tetramer can bind four oxygen molecules.
Answer:
natutal resources are those which is not made by anyone
human made resources are those made by human or artifical things
Because as humans grow bigger, so does there brain. So the smaller you are, the smaller your brain.
Hope this helped!
-Edge
