The ability to mutate [[Evolved Bacteria|'''Evolved Bacteria''']] is unlocked after destroying
4 [[ planets]].
Mutation requires two Bacteria of equal level and always gives one Bacteria of a higher level as a reward. The rarity of the mutated Bacteria is the same as the rarity of the used Bacteria. If they are of different rarities, the mutated Bacteria will have a random rarity in the same range, so it is not possible to obtain a higher rarity Bacteria through mutation.