Question

Bacteria, fungi and lower plants survive during adverse conditions by

• A. Suspended growth
• B. Migration
• C. Diapause
• D. Formation of thick-walled spores

Answer 1

Answer: (D)

Formation of thick-walled spores

Bacteria, fungi and lower plants survive during adverse conditions by formation of thick-walled spores or cyst. During adverse condition the spores or the cyst protect the bacteria from the ultraviolet radiation, gamma radiation, dessication, lysozyme, temperature and chemical disinfectant. Spores are mainly found in soil or water. Cyst are not as resistant as spores as it can be easily killed by heating at high temperatures. It is non- motile.

So, the correct answer is option D.