Answer:
Chemically altered nucleosides derived from canonical ribo-or deoxyribonucleoside-derivatives of adenosine, cytosine, guanosine, and uridine or thymidine are found in all types of nucleic acids, DNA and RNA. They are particularly abundant in noncoding RNAs, such as transfer RNAs and ribosomal RNA of higher organisms. By increasing the structural diversity of nucleic acids, modified nucleosides play important roles in gene expression and in regulating many aspects of RNA functions. They also contribute to nucleic acid stability and to protection of genetic materials against virus aggression. In this chapter we present a historical overview of the discovery, occurrence, and diversity of the many naturally occurring modified nucleosides that are present in both DNA and RNA of diverse organisms. We also briefly describe the different enzymes that accomplish these nucleic acid ‘decorations’. More information about the structure, function, biosynthesis and evolutionary aspects of selected modified nucleosides in DNA and RNA and their corresponding modification enzymes can be found elsewhere in this volume.
Explanation:
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Divorce refers to a situation whereby married couples decide to go their seperate ways due to several issues ranging from finance, violence, use of substances and several other factors. However, substance use accounts for the highest cases of divorce among couples.
Substance use simply refers to a condition whereby either the husband or wife gets used to ingesting harmful and addictive drugs such as <em>heroine, cocaine, Marijuana and similar substances. </em>
The high volume of divorce is caused due to the several irrational behavior ls which would likely emanate due to the use of these substances such as <em>domestic violence, irresponsibility and possible cases of mental illness</em>.
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1, 2& 4th bullet I think is correct
<span>There is evidence that cardiorespiratory exercise can help prevent heart disease due to the fact that it can help lower blood pressure. This exercise does not have to be high-intensity, serious fitness training - just a small amount of exercise each day can help contribute to a healthier body.</span>
