Answer:
7
Explanation:
There are 12 total pairs of ribs. 1-7 are attached directly to the sternum by costal cartilages, making them true pairs. 8-10 are fake pairs, which means they're attached indirectly to the sternum. And 11 and 12 and free floating ribs, meaning they aren't attached.
A chemical reaction bonding monomers together to make a polymer
I think 5 is carbon dioxide
The diploid is 30. The haploid is 15. Option C is most likely correct.