The best and most correct answer among the choices provided by the question is the first choice. The skin prevents from being thin by undergoing cell division to replace old, dead cells. I hope my answer has come to your help. God bless and have a nice day ahead!
His job was to observe and collect specimens of plants, animals, rocks, and fossils wherever the expedition went ashore.
I think they are called Sutural. Intra sutural bones also known as the wormian bones are extra bone pieces that occur within a suture (a joint) in the cranium. They are irregular isolated bones that appears in addition to the usual centers of ossification of the cranium and they are not rare bone despite being unusual.
DNA strands are held together by hydrogen bonds and separated by RNA polymerase when DNA copies itself.
i think the answer is right