The greatest biodiversity on earth is found in the TROPICAL RAIN FOREST BIOME.
The tropical rain forest has constant temperature and high rainfall, because of this the biome contain a diversity of ecological niches which ranges from the forest floor to the canopy. High level of reproduction is also possible as a result of high rainfall that is experienced in the biome.<span />
Fossils are usually found in sedimentary rock
Answer: The most serious of these mutations will be the insertion of 2 bases. Becasue the genetic code is read in triplets, a 2 base insetion will alter the reading frame of the code causing a frameshift mutation meaning every amino acid after the site of the mutation will be incorrect.
I would go with B. Because they are the most used.