When and how do bacteria turn into spores? Compare the structure of bacteria and spores.

Under unfavorable conditions, the bacterium turns into a spore, in which a very thick shell is formed in comparison with the resistant shell of the bacterium, which protects the bacterium from the harmful effects of the external environment and helps to wait out the unfavorable period. If a bacterium has an intensive metabolism, then in a spore it slows down greatly.

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