O2 (oxygen) is a covalent compound
Answer:
C: polysaccharide have more chemical bonds
Answer:
When you breathe in, or inhale, your diaphragm contracts and moves downward. This increases the space in your chest cavity, and your lungs expand into it. The muscles between your ribs also help enlarge the chest cavity. They contract to pull your rib cage both upward and outward when you inhale.
Prokaryotic are the cells that dont have a necleus or other important membranes of a cell and eukaryotic are just normal cells i think