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→Levelling
=Levelling=
Higher level evolved bacteria can be obtained through [[Research#Bacteria Mutation|''mutation'']] at the [[Research|Research Lab]]. Bacteria mutation is unlocked after the fourth planet.
Mutation requires two bacteria of equal level and 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.