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.
D. Number of protons in an atom's nucleus
<span>Ions are another name for charged atoms. Some elements are electropositive, and some are electronegative. Electropositive elements such as metals like to give up electrons, thus taking on a positive charge. Electronegative elements such as chlorine attract electrons, so they become negative. When electropositive and electronegative atoms meet and exchange ions, they take on opposite charges. Because positive and negative charges attract, these charged atoms become attracted to one another. This attraction forms an ionic bond that keeps the ions together.</span>
Answer:
Bananas.
- <em>vitamin C helps build your bones.</em>
- <em>fiber increases the weight and size of your stool and softens it.</em>
<em><u>i hope this helped at all.</u></em>
Active transport is the process that would be used to transport calcium ions through the calcium pump.
