The Genetic Variation, Mutagens produce the greatest variety. This category includes radiation (UV light, Xrays), chemical, etc. <span>They change DNA/RNA, thereby increasing the number of mutations, which in turn, leads to producing the greatest variety.</span>
Hierachy is a series of ordered groupings
-Surface area to volume ratio. (surface area / volume)
-Nucleo-cytoplasmic ratio.
-Fragility of cell membrane.
-Mechanical structures necessary to hold the cell together (and the contents of the cell in place)
The answer is A. Sympatric