DNA helps scientists to better classify organisms is because each organ has a specific kind of DNA. For an example, brains and hearts have many small types of RNA. So if a scientists see some RNA they know that its a heart or a brain.
Reduces your reaction time
1) You can say that you're busy so you won't be able hang out with him or her
2) Say that you don't define ,whatever they are doing, as cool so you will pass
3) You can say that you don't feel well and you have to stay in bed
Hope this helps!! :D
Well I cannot actually see any reasons,so I might as well just give my own.A drug might not recieve FDA approval because they need to find the good chemicals and the bad chemicals in the drug.If they find any bad chemicals in the drug,they will not approve it.Hope this helps!!!!