Answer:
What gets whiter the dirtier it gets?
I am constantly overlooked by everyone but everyone has me. What am I?
I have two body parts but am used to measure length. What am I?
By myself, I'm practically nothing. Worthless as a leader, but when I follow a group, their strength increases tenfold. What am I?
I am a seed with three letters in my name. Take away the last two and I still sound the same.
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.