I/GCSE Biology - Classification

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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