Classification, Variation and Inheritance_1

Classification
1. grouping things by their characteristics or features
  1. Kingdom
    1. Animals -multicellular -no cell wall -no chlorophyll -hetrotrophic
    2. Plants -multicellular -cell walls -chlorophyll - autotrophic
    3. Fungi -multicellular -cell walls -no chlorophyll -digest food outside the body (saprophytically)
    4. Protoctista -unicellular -nucleus
    5. Prokaryotae - unicellular -no nucleus
  2. Phylum
  3. class
  4. Order
  5. Family
  6. Genus
  7. species
Vertebrates and Invertebrates
1. vertebrates-animals with backbones
  1. fish-exchange oxygen and carbon dioxide through gills, lay eggs fertilised externally
  2. amphibians-exchange gases through their moist skin, lay external fertilised eggs
  3. reptiles and birds- exchange gases through lungs, lay internally fertilised eggs
  4. mammals-give birth to live young, eggs are fertilised internally
Species
1. organisms that can breed together to produce fertile offspring can be asexual or sexual reproduction
2. some species can breed with other species to produce hybrids which are sometimes sterile or infertile
Binomial Classification
1. every species has a unique binomial name
2. useful as everyone knows exactly what species you mean without confusion
3. genus name tells you what other species it is closely related to
4. allows scientist to communicate about the thousands of species easier
5. recognise areas of low biodiversity which need protection

Resource summary

	Created by Ammarah over 10 years ago

	Copied by Ammarah over 10 years ago