Microorganisms also exist in the fossil record, but they're rarer than other types of fossils. the most common fossils form from hard body parts such as bones, teeth, and shells. why do you think these fossils are more common than fossils of other soft tissues or microorganisms? i am on plato plz

Part a - which gene to compare? in this exercise, you will use the cytochrome c oxidase i (coi) gene to investigate relationships among salmon species. (this gene encodes a protein that functions in the mitochondrial electron transport chain.) you will compare the coi gene sequences from your salmon test samples to the standard sequences for each salmon species. in order for the coi gene to be useful for distinguishing among the different salmon species, which three statements must be true?