Answer: The basic unit of structure and function is the CELL.
Explanation: All living organisms are made up of cells. Each cell is specialized in it's structure to support the function it is intended for. Groups of specialized cells make up tissue (also specialized for a particular function), this group of specialized tissue makes up an organ, which forms part of a system, and then part of the organism as a whole.
Starts in the lower level up epidermis and works its way up
I'm gonna say Chemical makeup and how they can be used.
Answer:
The DNA must be copied so there is a full set of DNA to pass on to each daughter cell.