Bacteria are classified according to the pH range in which they can grow. Neutrophile pH range: 5.5 - 8. Acidophile pH range: 0 - 5.5. Alkaliphiles pH range: 7.5 - 11.
Note: Since I did not find the table 2, I will explain what the classification of bacteria is, and propose examples for you to understand. Then, you will have to make your classification according to the table.
Bacteria are cells that have different environmental requirements. Concerning pH, most bacteria have an acidic range in which they can grow keeping constant their internal pH level.
According to their pH requirement, bacteria can be classified as,
These cells can grow in environments in which pH is around the neutral pH level ⇒ 5.5 - 8
These are bacteria that grow in acid environments with pH inferior to the neutral pH level ⇒ 0 - 5.5
These bacteria grow in basic environments with pH superior to the neutral pH level ⇒ 7.5 - 11
Examples,
Bacteria pH range Classification
Escherichia coli 6-8 neutrophiles
Salmonella spp 5-8 neutrophiles
Lactobacillus acidophilus 4-6.5 acidophiles
Vibrio cholerae 8-11 alkaliphiles
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