Epiglottis
The epiglottis is a flap of cartilage the covers the entrance to the throat protecting the lungs from obstruction. It moves when we swallow to allow food in.
B. Thick Atmosphere
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Answer:
Nucleic acids are macromolecules that store genetic information and enable protein production. Nucleic acids include DNA and RNA.
Explanation:
It is called a contusion. Hope this helps.
