Sorry i needed the points... good luck tho
SI is a base 10 standardized system. I hope this helped and if not I highly recremend talking to your teacher or a parent.
Answer:
2) B
3) D
I believe that these are the answers, I hope this helps!
The answer to this question is histidine. Histidine i<span>s an </span>α-amino acid<span> involved in the biosynthesis of </span>proteins. The structure of histidine includes<span> an </span>α-amino acid<span>, a </span>carboxylic acid group<span>, and an </span>imidazole<span> side chain. Histidine was initially thought to be </span>essential<span> only for infants; however, it has since been found to be essential for adults too.</span>
