Answer:
As soft as silk, as white as milk, as bitter as gall, a thick green wall, and a green coat covers me all.
I can be quick and then I'm deadly, I am a rock, shell and bone medley. If I was made into a man, I'd make people dream, I gather in my millions By ocean, sea and stream.
The more of them you take, the more you leave behind. What are they?
What can be measured but not seen?
I'm a bacteria that causes typhoid What's my name ?
I have two eyes in the front and a lot of eyes on my tail