Answer:
The correct answer is: upper esophageal sphincter.
Explanation:
The alimentary canal is a very long tract responsible for the digestion of the food. It is composed of several organs with many different and important functions. The alimentary canal also has a few sphincters, which are muscular valves that open and close when needed for the food to pass or be retained.
The first sphincter is the upper esophageal sphincter. One particularity of this sphincter is that is one of the few sphincters in the body that opens and closes under our conscious control, which happens when we decide to swallow our food.
From the first to the last, the order of the sphincters in the gastrointestinal tract is: upper esophageal sphincter, lower esophageal sphincter or gastroesophageal sphincter, pyloric sphincter, ileocecal sphincter, and anus.
Answer:
Sea urchins have a unique relationship of oxygen and carbon-di-oxide.
Explanation:
Sea Urchins spread oxygen in a unique way. They take in oxygen by staying inside water. Oxygen enters the body through their gills and tubed feet. CO2, which is waste is released through the anus. They get oxygen only through diffusion, i.e. diffusion of oxygen into the organism. Oxygen diffuses in body through the canals and carbon dioxide diffuses back into the canals. Urchins also have the capability to cope up with rising CO2 levels in the sea.
<span> The feature which is not the result of a glacier carving out rock as it moves is
</span><span>A. Terminal Moraine
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The feature which is the result of a glacier carving out rock as it moves is
</span>A. Roche Moutonnees
Explanation:
Rôche moutonnée (or sheepback) could be a rock formation created by the passing of an ice mass. The passage of ice mass ice underlying bedrock usually leads to uneven erosional forms as a result of abrasion on the "stoss" (upstream) facet<span> of the rock and plucking on the "lee".
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A terminal ground<span> </span>conjointly referred to as finish ground<span>, </span>could be a form of ground<span> that forms at the snout (edge) of an </span>ice mass<span>, marking its </span>most<span> advanced. At </span>now<span>, </span>rubble<span> that has accumulated by plucking and abrasion.</span>
Answer:
Small head
Explanation:
Since the genes are located in the nucleus of a cell which has being removed (but some genes are still located in the mitochondria of the ocyte) from its ocyte to fuse it with with another nucleus. Since the cell follows a maternal inheritance of gene, it would have a small head because of the presence genes in the mitochondria.
