During the first stage of the cell cycle a cell
1 grows in size
2 divides in half
3 duplicate its genetic material
4 makes a copy of itself

Because the carnivores keep the herbivore population in check 

Air enters through the nose (and sometimes the mouth), moves through the nasal cavity, the  pharynx, the  larynx, enters the  trachea, moves through the  bronchi  andbronchioles  till the alveoli.