- they don't have a nucleus and other membrane-bound organelles
- its DNA is found in the nucleoid
- the cell wall is extra protection, helps keep the cell's shape, and prevents dehydration
- their small size allows the quick entry and diffusion of ions and molecules to other parts of the cell while also allowing fast removal of waste products out of the cell
The SI unit for amount of substance is the mole. It has the unit symbol mol. <span>The mole is defined as the amount of substance that contains an equal number of elementary entities as there are atoms in 12g of the </span>isotope carbon-12<span>.</span>
