Answer:
<h3>c. smooth muscle</h3>
Explanation:
The cartilage and mucous membrane of the primary bronchi are similar to that in the trachea. As the branching continues through the bronchial tree, the amount of hyaline cartilage in the walls decreases until it is absent in the smallest bronchioles. As the cartilage decreases, the amount of smooth muscle increases.
Answer:
Evolution is a process of change in a population through genetic variation over time Evolution involves change over time and descents from common ancestor
Yes humans can walk on this planet without aid from a space suit but it can still cause suffercation
Concentration gradient= the difference in the concentration of a substance between two areas.
