Cant figure this joke out and unsure where to ask, so here!

I was telling my daughter some banana jokes from a website. I found the jokes:

Q: How do you spell banana? A: E, V, I, L.
Q: Do banana's drink coke or pepsi? A: Neither, they drink blood because they're evil.

source: http://www.jokes4us.com/miscellaneousjokes/foodjokes/bananajokes.html

I can't figure this out and its driving me crazy. Can anyone explain this?

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