Read the sentence below from the story “The Expert”: “That’s pokeberry, and some botanists warn against eating the fruit.” What does the word “botanists” mean in this sentence? A. plant scientists
B. magazine writers
C. bird watchers
D. forest rangers

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.