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Monday, September 27, 2010

Kingdom Protoctista:
  1. Subklngdom Algae
      (i)  Phylum Chlorophyta (green algae)
      (ii) Phylum Phaeophyta (Brown algae)
  2. Subkingdom Protozoa
      (i)   Phylum Rhizopoda (Rhizopods)
      (ii)  Phylum Ciliophora (Ciliates)
      (iii) Phylum Zoomastigina (Flagellates)


Monday, September 20, 2010

Classification of organisms

Living organisms can be classified into five-kingdom system:

Classification of viruses

Classification of viruses would be based on:
(a)          type of nucleic acid
(b)         shape of protein coat
(c)          type of host cell they invade (plant viruses, animal viruses or bacteriophaees, viruses which attack bacterial).