Transcript:
Arlo: What is the difference in jam and jelly?
Janis: I'm not sure!
Arlo: Tsk, tsk! What would your old granny say?
Janis: That old bat can go suck eggs! She's dead anyway!
Arlo: I meant the granny you liked!
Janis: Oh! She didn't know either, I'll bet!
I am not sure, but I believe that jam has pieces of the actual fruit in it, such as chunks of strawberries, blueberries, etc., while jelly is kind of like a thick Jello like substance, with only the flavor & color of the fruits.