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Class 9
Chapter 7 Class 9 - Diversity In Living Organisms
  • Some bacteria have a very thick cell wall which makes them take up Gram stain and appear violet.
  • There are other bacteria which have a thin cell wall and on Gram staining appear pink.
  • Usually, gram +ve bacteria are pathogenic in nature.

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Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 13 years and a teacher from the past 17 years. He teaches Science, Economics, Accounting and English at Teachoo