Select the correct answer from each drop-down menu. What structural element of the paragraph is the underlined sentence, and how does it connect ideas in the text? The underlined sentence is. It connects ideas in the text by.

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.

Hold one let me think