What three bones fuse during childhood to form the coxal bone?

Ascientist is conducting an investigation that involves water, silver, carbon dioxide, and oxygen gas which group of statements best describes all of the materials he is using in the investigation?

Hairs that clean dirt out of the air in your nasal passages are called: a. sinus b. trachea c. cilia d. mucus

How do specific cell structures and organelles contribute to maintaining homeostasis in the cell?