Speciation is the process by which new species form. It occurs when groups in a species become reproductively isolated and diverge. In allopatric speciation, groups from an ancestral population evolve into separate species due to a period of geographical separation.
Gastrointestinal stromal tumor (GIST)
Stomach cancer can also be refers to as
gastric cancer, thus, stomach cancer develop from the inner lining of the
stomach. However, tumor produced by the gastric cancer is known as
gastrointestinal stromal tumor (GIST). Some of these tumor are non-cancerous while
other are cancerous and they can be found anywhere in the digestive tract.
The parasympathetic nervous system <span>conserves energy as it slows down heart rate, increases intestinal and glandular activity, and relaxes the sphincter muscles of the gastrointestinal tract. It gets the nickname "rest and digest" for doing exactly so. Typically most active when sleeping, however is also the explanation for post-prandial fatigue, or being tired after eating (especially a large meal).</span>
<span>Prokaryotes don't have a nucleolus as they do not have a nucleus, and neither do they have a Golgi apparatus. A nucleoid is loose DNA which is found in prokaryotes but not in eukaryotes
so which matches the description</span>
