2 is crescent and 4 is gibbous
<span>If a chemist adds ammonia to a cleaner, he would expect the litmus paper to turn blue. Ammonia is a basic compound with no ions, however in solution it gains an ion and becomes ammonium. These basic ions interact with the litmus paper and turn it blue.</span>
DNA is that chemical used by the cell to multiply and function . It works like a code for all functions.
