The answer you are looking for is the VEI scale, also known as the Volcanic Explosivity Index. The scale ranges from 1-8. Volcanic eruptions are classified due to how much volcanic material is ejected into the atmosphere, the height of the plume cloud, and how long the eruptions last. For example, the eruption of Mount Tambora in 1815 was a VEI 7 and caused the year without a summer. Volcanic eruptions in VEI 6 and 7 ranges are really rare, but VEI 8 eruptions are the rarest. VEI 8 eruptions are known as super eruptions, and they happen around every 100,000 years. Sorry, I got a little bit carried away. But, anyways, the VEI scale is the correct answer.
Answer:
2. Circular, looped, folded, single stranded DNA known as the bacterial chromosome
Explanation:
The bacterial chromosome of a prokaryotic cell, does not occur in the typical X chromosome found in eukaryotic cells, but it is a long folded and looped molecule composed of double-stranded supercoiled DNA. In this case, DNA occurs freely and covalently closed in a circular shape in the cytoplasm and it does not bind with proteins.
Four general conditions necessary for natural selection to occur<span> are: A. More organisms are born than can survive. B. Organisms vary in their characteristics, even within a species. D. Differences in reproduction and survival are due to variation among organisms.</span>
