Answer:
Local effects of volcanic eruptions
Explanation:
Lava flows, volcanic landslides, mudflows, and ash flows (nuees ardentes) generally result in total obliteration of any ecosystem in their path. ... Volcanic ash weathers rapidly and releases plant nutrients.
Adenine, guanine, thymine and cytosine are the four nitrogenous bases that are attached to a sugar molecule<span> on each </span>side of the ladder<span>. When a phosphate, a sugar and a base form an attachment, they create a sub-unit of </span>DNA<span> called a nucleotide. Each nitrogenous base is held together by a hydrogen bond.</span>