Imagine how college sports will change in this century if inventions and coaching techniques even more technologically sophisticated.

The correct answer is become. If inventions and coaching techniques become even more technologically sophisticated (imagine scoring data, use of new computers and tablets, software programs or apps), then college sports will certainly change in this century.

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.