Question

Thick walled resistance structures formed in bacteria during unfavourable conditions are

• A. Gemmules
• B. Zoospores
• C. Endospores
• D. Conidia

Answer 1

Answer: (C)

Endospores

Endospores are the thick-walled resistance structures that are formed in bacteria during unfavourable conditions like high temperature, high UV irradiation, desiccation. These are asexual spores. These are converted into vegetative cells when favourable condition returns. Gemmules are the tough thick walled cluster of embryonic cells that are formed by a freshwater sponge during unfavourable condition. Zoospores are motile asexual spores that serve as a mode of asexual reproduction in some algae, fungi. Conidia are asexual, non-motile spores of a fungus that serves as a mode of asexual reproduction.

Thus, the correct answer is option C.