Limestone. Hope this helped!!!!
<span>The mechanism that affected the gene pool of the immigrants that entered the United States through Ellis Island from 1892 to 1954 is B. gene flow. Gene flow is the transfer of genes or alleles from one population to another. The migration of millions of individuals from countries across the Atlantic Ocean to the United States is responsible for the changes in the gene pool of the immigrants.</span>
Answer:
mucosa
Explanation:
The pharynx and esophagus possesss all of the basic histological layers of the gastrtointestinal tract (GI tract). The layers are:
- mucosa - layer closer to lumen which cocnsists of epithelium, lamina propria and muscularis mucosae
- submucosa-layer of loose connective tissue with vessels
- muscularis propria-layer of inner circular and outer longitudinal muscular layers
- adventia - layer of loose connective tissue
