Question

What do you think would have happened if the backbone had only one long bone instead of many vertebrae?

Answer 1

It would not be flexible like it's is right now we would not be able to bend or do other kind of activities how we are doing a single long bone cannot bend down or back wards so we would be sitting straight if we would have a long straight bone

Answer 2

Well its easy to understand that because If there have had been a long bone spinal cord  , We couldn,t bend and our central nervous system could have suffered from injuries leading to fatal disabilties. The CNS is fixed with the vertebras of the spinal cord, so the long bone couldn't have the same amount Of nerves.