"She's Not There"

Yester-day, I was playing around with "She's Not There."  I knew that it's in A minor, so from memory I figured out (roughly) the vocal melody, and I noticed something interesting about it.  To-day I referenced the recording, a section of an old Dutch documentary I found on YouTube a few years ago where Rod Argent goes through the song explaining some things, and a book of notation of Zombies songs published by Alfred Music to confirm what I'd figured out and what I discovered.  The vocal melody is entirely in A minor with only one accidental.  In this section:

But it's too late to say you're sorry
How would I know, why should I care
Please don't bother trying to find her
She's not there

the "there" in "She's not there" is sung to a G#.  To some degree, that change in tonality musically represents the absence.

I also noticed that the bass part before second "Well, no one told me about her..." section (at about (0:47) starts with the same five notes as the vocal melody:

In a couple interviews, Rod Argent's said that he often wrote the bass parts for his songs (I think he's even mentioned the bass part of "She's Not There" specifically), and this is a great example of how - because of that - the various parts are closely related.