Answer:
Buzzing and bumbling is all we do, we fly from one plant to another and may be noisy, but hey, we are busy making sweet treat that is oh so sugary.
They live only in stories, taller than three storeys.
I usually wear a yellow coat. I usually have a dark head. I make marks wherever I go.
What has a spine, tail, and leash but isn't a dog?
What asks no questions but requires many answers?
Before I grow I'm small. When I'm old I grow tall. When I die I give a mighty fall.