Scientists often perform experiments to check and recheck their work. They also redo these experiments to ensure correct results.
Answer:
The main function of the alveoli is storage of air for a shorter period which permits absorption of oxygen into the blood. The gaseous exchange of oxygen and carbon dioxide typically takes place in the alveoli. The main function of the bronchiole is to allow the passage of air freely into the lungs
They have been in the Northern and Southern polar regions, and not within the inner part of earth, maybe due to there location
Answer:
The answer is b for apex.
Explanation:
