Answer:
In genetics, the term junk DNA refers to regions of DNA that are non-coding. Some of this noncoding DNA is used to produce noncoding RNA components such as transfer RNA, regulatory RNA and ribosomal RNA.
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Based in our early biology, and anatomy subject, we all know that the Heart pump the blood to every veins in our body. This blood contains nutrients, oxygen and very important molecules or elements that is need in our body specially the function of organs and the reproduction of cells.
A terrestrial ecosystem is a land-based community of organisms.
