Where organisms are better adapted to their environments tend to survive and produce more kids!
Protection- the cranium and ribs protect the brain and vital organs in the chest
Shape- gives shape to the body and makes you tall or short
Support- holds your vital organs in place when playing sports. The vertebrae column holds the body upright
Movement- muscles are attached to bones, which are joined. When the muscles contract, the bones move
Blood Production- red blood cells(to carry oxygen) and white blood cells(to protect against infection) are produced in the bone marrow of some bones
I think it will be RNA for both questions
Two identical DNA strands
Answer:
Rosalind's x-ray showed that the ladders of nucleotides were inside a double helix.
Watson and Crick built models with the ladders on the outside.