Answer:
commensalism
Explanation:
Commensalism is a symbiotic relationship in which one species benefits from the interaction and the other species is neither harmed nor helped. So the bird is being helped and the bison is being neither harmed nor helped.
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Answer:
Uvula
Explanation:
The uvula is a fleshy structure found at the back of the soft palate in the mouth. It is the structure seen hanging at the back of the throat when someone opens his/her mouth and views in the mirror.
<em>The uvula is made up of flexible tissues with the ability to produce saliva. During eating or swallowing of food, the uvula along with the soft palate move to seal off the pharynx in order to prevent food materials from entering the nasal passage.</em>