1. It makes international projects easier to handle
2. It avoid errors when some part of a project may be in traditional US units.
Remain stable is the answer
A Enzymes read the DNA code and build a new DNA molecule from scratch
Im not for sure but i think its D if that helps any
Saturated fatty acids lack double bonds between the individual carbon atoms, while in unsaturated fatty acids there is at least one double bond in the fatty acid chain. Saturated fats tend to be solid at room temperature and from animal sources, while unsaturated fats are usually liquid and from plant sources :)