Which value most closely represents the amount of freshwater on earth, as a percentage of the total water on earth? 71 percent 50 percent 12 percent 2 percent

on island x the species needed to adapt because they were being subject to predators which didn't inhabit island y.  

air enters through the nose, moves through the nasal cavity, the pharynx, the larynx, enters the trachea, moves through the bronchi andbronchioles till the alveoli.