Question

5. Give an example of an organism that can survive best in the following conditions:

   1. acidic

   2. basic

   3. neutral pH

Answer 1

Acidic:-The organisms that can survive best inower PH are known as acidophiles .They can survive in PH lower than 3.These microorganisms commonly found in volcanic and mining areas.Thiobacilus acidophilus (bacteria),vorticella(a type of eukaryote) are good examples of acidiphiles.picrophilus oshimae needs optimum PH 1 for optimum growth.

Basic:-Obligate alkaliphiles can survive best in high PH.Natronobacterium gregoryi can grow in PH 10.most of the alkaliphiles possess bacillus morphology.

Neutrals:-The organisms can survive in PH range (5.5-8) and known as neutrophiles. They are commonly found in soil and water.Escherichia coli is the best example of neutrophiles which can grow in PH 7.