During unfavourable conditions, certain bacteria produces:

Explanation

Spores are specialized structures produced by certain bacteria, fungi, and other organisms during unfavorable conditions. Bacterial spores are highly resistant environmental strasses like heat, radiation, and dessication. Spore formation is a survival strategy that allows bacteria to enter a dormant state, protecting their genetic material and essential components until more favorable conditions arise. When conditions improve, spores can germinate and grow into vegetative cells again.