1, what does "pm" mean?
2, A.
I hope this helps. that is caused by the differences in temperature
Answer:
I believe the answer is <em>keratin</em><em> </em>
Explanation:
<em>PLEASE</em><em> </em><em>DO MARK</em><em> </em><em>ME AS</em><em> </em><em>BRAINLIEST UWU</em><em> </em>
Each hemoglobin molecule is made up of four heme groups surrounding a globin group, forming a tetrahedral structure
This is all I know about this, let me know if you still have questions ;)