What does it mean to "follow a natural order" when writing?
a. covering your ideas in a logical, step-by-step manner that the reader can follow.
b. writing your ideas in the order they occur to you, naturally.
c. writing in an informal manner.
d. presenting your ideas one after the other, without interrupting the natural flow with explanations

A) covering you ideas in a logical,step by step manner that the reader can follow

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.