Answer:Selective Permeability
Disesadessdew..............
The universe began about 14 billion years ago. Or 13.7 billion
Tracheids is the word your looking for i believe
External nares are another term for nostrils. Naturally, pigs use their nares to breathe in air and expel filtered air from the lungs. The scientific terminology for air entering the lungs is known as inspiration, while air going out is termed expiration.
