The aveoli opens and closes to allow the oxygen in but keep out food liquids any thing that's not a gas bacicaly
It grows , as well as the internet does.
Answer:
Mutations are permanent changes in the DNA due to changes in nucleotide sequences. Mutations that cause addition of extra nucleotides in a nucleotide sequences are known as frameshift mutations
VGHCGGF8TDTURTFT7HGHGYU5CTRTVGFRYCVTYFTCGRCFFT
Answer:
The nitrogenous bases in RNA are the same, with one exception: adenine (A), guanine (G), uracil (U), and cytosine (C).
Explanation:
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