The process of dna replication is necessary before a cell does what

If water were a non polar molecule, how would its properties be different ? a.) water would be a much lighter molecule b.) water would be able to climb up inside plants c.)water would not be able to form hydrogen bonds d.) water would stick together much more strongly

Restless tectonic plates move (shift) between one and fifteen centimeters per year month day minute

What is the difference between a scientific hypotheses and a scientific theory?