As covalent bonds are strong it makes the sugar phosphate backbone a stable molecule which will HV less chances for a mutation while the huydrogen bonds exist for the ease of DNA replication as they are strong in a way but weak for the replication to take place easily.
Scientist study index fossils so they will get an understanding of what life was like back then.
<span>A::T and G:::C is essential. The importance to the DNA structure is that prevents lose of genes and mis-formation of encoded products (protein and mRNA).</span>
Breathing in air pollutants can irritate your airways. It may cause shortness of breath, coughing, wheezing, asthma episodes and chest pain. Overtime, exposure to air pollution puts you at risk for lung cancer, heart attack/strokes, etc. Some people are more at risks from others though
