I think the answer is A) steroids
Hope this helps!
Cell theory was fdiscovered in the 17th century. but the first. cell theory was credited in the 19th century.
Regeneration is the ability to gain something back again.
<span>Membrane structure and function: The plasma membrane, also known as the cell surface membrane or plasma-lemma, is the boundary of the cell. It regulates the movement of materials into and out of the cell and facilitates electrical signaling.</span>
