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I/GCSE Biology - Classification

Classification

· biology,igcse biology,IGCSE,classification,gcse biology

Classification

  • Grouping things by their features or characteristics
  • The more characteristics that are used to group similar organisms together, the more reliable is the classification

Kingdom - Group of similar phyla e.g. Anamalia

Phylum - Group of similar classes e.g. Chordata

Class - Group of similar orders e.g. Mammalia

Order - Group of similar families e.g. Carnivora

Family - Group of similar genera e.g. Canidae (dog family)

Genus - Group of similar species

Species - Organisms that have most characteristics in common e.g. Canis lupus 

Five kingdoms of organisms

1) Anamalia (animals):

  • Multicellular
  • No cell walls
  • No chlorophyll in cells
  • Feed 
  • heterotrophically (eat other organisms)

2) Plantae (plants):

  • Multicellular
  • Have cell walls
  • Have chlorophyll
  • Feed autotrophically (make own food)

3) Fungi

  • Multicellular
  • Have cell walls
  • No chlorophyll
  • Feed saprophytically (digest food outside the body)

4) Protoctista

  • Mostly unicellular (body is a single cell)
  • nucleus in cell

5) Prokaryotae

  • Unicellular
  • No nucleus in cell

That's the end of today's topic!

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Drafted by Yoshi (Biology)

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