Answer:
I am useless when together but useful when I am broken apart. What am I?
I am the book one can never finish reading
I am needed for most animals and hardcover books. What am I?
I am constantly overlooked by everyone but everyone has me.
I have more shoes than anybody, but less feet than everyone. I am met in the morning, but departed in the night. I may shake as if I'm angry, but I won't bite. What am I?
The answer I give is yes, but what I mean is no. What was the question?