Who can me write a persuasive speech essay ? any topics .

A tip i can give you is to use a topis that you are strong about. Forexample, if you strongly believe that state tests should not be administered you should use that. But ypou need evidence to back this claim up. If you dont, then the essay wont be persuasive it will only be an opinion that people wont believe. 

Okay, biology isn't exactly my strongest subject (it never has been), but i'm pretty sure the answer is nucleotides. dna is made up of nucleotides. each nucleotide contains a phosphate group, a sugar group, and a nitrogen base. there are four different nitrogen bases: adenine (a), thymine (t), guanine (g), and cytosine (c). a always pairs with t, and g always pairs with c.