The diagram above represents a typical bacterium. Which of the following features is found only in prokaryotes? A. The organism isn’t capable of making its own ATP.
B. The organism has no nucleus.
C. The organism contains ribosomes.
D. The organism is surrounded by a cell wall.

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?