The earth was once formed by molten layers of the earth and over time layers began to form due to the relative melting points. hope this helps :D
C i think . Hope this helps
The Pathway
• air enters the nostrils
•passes through the nasopharynx
•the oral pharynx
•through the glottis
• into the trachea
• into the right and left bronchi, with branches and rebranches into
• bronchioles each of which terminates in a cluster
• alveoli
Answer:
1. Absorption is the answer
Approximately 50% of the human genome