Why is cartilage important?

a. it contains a fluid that enables the surfaces of bones to slide over each other smoothly at the joints.
b. it causes bones to fuse together as they grow.
c. it acts as a cushion between bones and protects them as they move against each other.
d. it holds bones together at the joints.

As scientists have investigated evolution from a variety of fields, they have found that some of darwin's orginal ideas were inaccurate or incomplete. t explanation provided by evolution was updated each time to reflect the new information they found. what does this suggest about the theory of evolution? it has become a stronger and clearer theory as new information is collected.