Biological Classification Question 13
13. Which of the following are found in extreme saline conditions?
(a) Eubacteria
(b) Cyanobacteria
(c) Mycobacteria
(d) Archaebacteria
Show Answer
Answer : d
Hints & Solutions
(d) Archaebacteria are able to survive in harsh conditions due to the presence of branched lipid chain in cell membrane that reduces fluidity of cell membrane. It includes halophiles which are exclusively found in saline habitats. The halophiles, named after the Greek word for “salt-loving”, are extremophiles that thrive in high salt concentrations. While most halophiles are classified into the domain Archaea, there are also bacterial halophiles and some eukaryotic species, such as the alga Dunaliella salina and fungus Wallemia ichthyophaga.
