Answer:
Four major cell types produce a physical and chemical barrier to infection of the airways, including ciliated cells, mucus-secreting goblet cells, and club cells, which produce antimicrobial compounds and basal cells which, along with club cells, serve as regional progenitor cells to replenish the other cell types
C., or disruptive selection. This occurs when the extremes of a trait are selected for, leading to more organisms with those phenotypes in the population.
Answer:
Transfer RNA
Explanation:
The transfer RNA is the smallest of the RNA molecules, its main function is to transport the aminoacids in the protein synthesis. They carry the aminoacids that are added to the growing polypeptide chain.
Answer:
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