Answer:
a) snRNA
Explanation:
The association of small nuclear RNA (snRNA) and some specific proteins forms small nuclear ribonucleoprotein complexes. Some complexes are spliceosomes, molecular machines -made up of a snRNA and about 80 proteins- that remove introns from pre-mRNAs via successive phosphoryl transfer reactions.
<span>thinning of the epidermis and decline of the protein elastin</span>
I don't know much but i believe the immune system which protects the body from viruses is one of those<span />
I believe its D. All of the above