Answer:
to get rid of carbon dioxide, along with it being necessary to yknow... continue living.
Explanation:
The exons of the pre -mRNA contain the protein -coding regions.
Pre mRNA is the first made mRNA transcript and requires undergo many post transcriptional modifications for the formation of a mature mRNA.
The exons are the regions of the pre-mRNA that are found in the mature RNA, after the splicing of introns takes place.
RNA splicing is the process in which the non-coding segments of the RNA, which are known as introns, are removed by the help of small nuclear ribonucleoproteins. These SnRNPs make the spliceosome, which catalyzes the process of splicing.
After the introns are removed by the splicing process, the exons are covalently joined, which forms the mature mRNA.
Learn more about mRNA from here:
brainly.com/question/21312423
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Your answer to this question is A Rigid Cell Wall.
Answer:
B
Explanation:
Water, sunlight and amount of oxygen in water
It is C, <span>Matter and energy are conserved as they pass through a food web.</span>
