Answer: all of them
The rib cage is formed by 24 ribs (12 pairs). Their function is to protect the lungs, heart, and other internal organs of the thorax. They also enable the lungs to expand, facilitating breathing by expanding the chest cavity.
From those 12 pairs, 7 pairs are "true ribs" directly attached to the sternum and the rest are called "false ribs" because some are suspended or share cartilage that connects to sternum.
Most life cycles of large stars end in them becoming either a neutron star or a black hole.
If an individual with wavy hair mates with an individual with straight hair, what is the probability that their child will have curly hair? ... curly hair and an individual with (naturally) straight hair mate; all of their offspring have (naturally) wavy hair.