Three parts of the gene that do not appear in the final mrna

Introns

Explanation:

In RNA processing event commonly known as RNA splicing, some non-required parts of pre-mRNA are removed. These non-required parts are Introns also known as junk sequences which are removed by spliceosome (a complex of protein-and-RNA). Later the good parts i.e exons are assembled together back to back. Thus, final mature mRNA consists of pasted exons that are later removed out of the nucleus.  

he movement of air through earth's or any planet's atmosphere is called wind, and the main cause of earth's winds is uneven heating by the sun. this uneven heating causes changes of atmospheric pressure, and winds blow from regions with high pressure to those with low pressure.

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