   In this kingdom, cell walls form two thin           They are unicellular organisms with no
    overlapping shells.                                  specific mode of nutrition.
   Walls are embedded with silica. Cell walls          They are both aerobic and anaerobic. The
    deposit forms a diatomaceous, which is               presence of cell wall, which are composed
    used for polishing, filtration of oils and           of peptidoglycan. They have naked DNA
    syrups.                                              with the absence of membrane bound
   Mostly marine & photosynthetic.                      organelles. Reproduction is through by
                                                         binary fission.
Some important groups are listed below.
                                                    Some important groups are listed below.
Protozoans – animal like single-celled
organisms.     e.g. amoeba, foraminifera,           Archaebacteria – these are microbes that live
paramecium, plasmodium                              in extreme and harsh conditions, they are
                                                    known as extremophiles. These bacteria lack
Algae – plant like single or multi-celled           cell wall, their cell membrane is made up of
organisms. e.g. green algae, red algae, brown       different lipids, and their ribosomes are similar
algae, golden algae, fire algae                     to that of eukaryotes. These are of three major
                                                    groups of bacteria based on their habitat i.e.,
Moneran Kingdom (Monera)
                                                    thermophiles, halophiles and methanogens.
   The kingdom consists of very small and
                                                    Eubacteria – These are true bacteria. The
    one-celled organisms.
                                                    characteristic feature is the presence of rigid
   They are prokaryotes, which includes
                                                    cell wall and if present a motile flagelllum that
    species such as bacteria, archae bacteria,
                                                    aids in locomotion.
    cyanobacteria and Mycoplasma.
   They are present almost everywhere
    around us.
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