Biology

Classification

- grouping organisms by their characteristics or features. The more characteristics used to group the more reliable the classification

Smaller groups can be grouped into larger groups...

• Kingdom      e.g. Animalia
• Phylum        e.g. Chordat
• Class           e.g. Mammalia
• Order           e.g. Carnivora
• Family          e.g. Canidae (dog family)
• Genus          e.g. Canis
• Species        e.g. Canis Lupus (domesticated dog)

KINGDOMS

- a group of similar phyla                                                   

• Animalia (animals)                      Multicellular- body of many cells  
  • Multicellular                              Heterotrophically- eat other organisms
  • no cell walls                              Saprophytically- digest food outside of the body
  • no chlorophyll                           Autorophically- make their own food
  • fedd heterotrophically               Unicellular- body of a single cell
• Plantae (plants)
  • Multicellular
  • hace cell walls
  • have chlorogphyll
  • feed autotrophically
• Fungi
  • Multicellular
  • have no cell walls
  • no chlorophyll
  • feed saprophytically
• Protoctista
  • Mostly unicellular
  • nucleus
• Prokaryotae
  • unicellular
  • no nucleus in cell

Vertebrates and Invertebrates

- In a phylum 'Chordata' the animals have a supporting rod running across their back, many animals in the chordata are vertebrates

Vertebaret grups split in to five groups...

• Oxygen absorbtion- some use gills others use their lungs
• Fertilisation- inside the body (internal fertilisation), outside the body (external fertilisation)
• Reproduction- young born alive (viviparous), lay eggs (oviparous)
• Thermoregulation- controlling their body temperatre (homeotherm), body temperature varies with enviroment (poikilotherm)

Vertebrates…