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Based on respiration bacteria are of two types

Aerobic bacteria

These are of two types

  1. Obligate aerobic - These are completely aerobic and die in the absence of 02 e. g. Azotobacter
  2. Facultative anaerobic - These are normally aerobic bacteria but can survive in the absence of O2

e. g. Acetobacter aceti Clostridium tetani

Anaerobic bacteria

These are of two types.

  1. Obligate anaerobic - These are completely anaerobic bacteria and do not have capacity of aerobic respiration. e. g. Clostridium botulinum
  2. Facultative aerobic - These are normally anaerobic but also have capacity of aerobic respiration.

e. g. Fermentation… (4 more words) …

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Actinomycetes - Filamentous Bacteria

  • They were previously included in Fungi and were known as Ray fungi, because structurally they are similar to fungi.
  • The body of fungi is known as mycelium and the structure of actinomycetes is also similar to mycelium. Therefore they were included in fungi. But fungi are eukaryotic while actinomycetes are prokaryotic. So these are now placed in kingdom Monera.
  • Now their new name is Mycobacteria, Mycelial bacteria or Filamentous bacteria.
  • Filamentous bacteria are found more in soil.
  • These bacteria have economic importance because they are used to prepare many antibiotics.

Note: Asexual reproduction by conidia.

eg. Streptomyces, Mycobacterium, Beggiatoa, Frankia

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