Answer:
B I Took The Test An My teacher Say It Right
Explanation:
comes from the earth's crust<span />
1. Air enters the nostrils.
2. Air passes from the trachea to the bronchi
3. Air diffuses from the alveoli to the blood cells.
4. Oxygen enters the blood cells.
5. Blood transports oxygen to other cells.
RNA (: stranded RNA virus that infects specifically the parasitic protozoan G. lamblia. Among the many collected strains of G.
Knowledge of earth system in order to protect, understand and develop research methods.
