Disulfide bonds. is that an answer?
Answer:
Your bloodstream.
Explanation:
The cells in your pancreas produce insulin which needs to be sent to the rest of your body to tell your cells to take in glucose (sugar) for energy. In order to get sent out of the pancreas' cells, the insulin needs to go through your bloodstream.
The answer is.d. stromatolites hope it help
Which is one of the six fundamental elements that are found in living organisms?