Ribs that are not attached to the sternum at their anterior costal cartilages are known as1.vertebrochondral ribs2.vertebrosternal ribs3.floating (vertebral) ribs4.true ribs5.sternocostal ribs

floating (vertebral) ribs

Explanation:

In a typical vertebrae there are 12 pairs of ribs. Each rib is a flattened bone with curvature. These ribs contributes to the wall of the thorax. The last 2 pairs of ribs are not connected with the sternum bone and it's associated cartilage. These ribs are called as the floating ribs. The floating ribs are attached with the vertebral column. These ribs are small and relatively delicate as compared to other pairs of ribs. These ribs include a cartilaginous tip.

bacteria could be both, harmful and to us. harmful bacteria could make us sick and probably even by getting the chances of getting a disease, but good bacteria fight it off with your immune system. there is always bacteria everywhere we go. we need to make sure to wash our hands after using the restroom, before eating, after eating, after petting an animal too. so you see, bacteria is everywhere and is harmful or . i hope this . : ) : ) : )

answer is d hope this