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Classification and Biodiversity . Lesson 1. Principals of Taxonomy. . 1 Minute Challenge. . Place the chocolate bars into 3 groups. . Taxonomy. What is taxonomy? Linean system… What is a taxon?

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classification and biodiversity

Classification and Biodiversity

Lesson 1. Principals of Taxonomy.

1 minute challenge
1 Minute Challenge.
  • Place the chocolate bars into 3 groups.
taxonomy
Taxonomy
  • What is taxonomy?
  • Linean system…
    • What is a taxon?
    • What are the 7 main taxons? Which one contains the most amount of species? Which one contains the least amount of species?
    • What are the 5 kingdoms? Give a brief description of each one.
    • Find an example of the linean system of classification for an organism in the animal kingdom and in the plant kingdom.
defining a species
Defining a Species.

3 things to consider in defining a species:

  • Same species – if they are similar to each other & different from members of other species – can be physical, genetic , protein, behaviours
  • Same species – if able to breed together in their natural environment to produce fertile offspring
  • Different species of organisms have different ecological niches

Combine these 3 to come up with a definition of what a species is

hybrids
Hybrids
  • It is sometimes possible that organisms that have been classified as two separate species, can reproduce to produce fertile offspring.
  • This offspring is known as a hybrid.
who was this man and why might he have changed things
Who was this man and why might he have changed things?
  • Linnaean System
  • Logical
  • Based on simple observations
  • No one came up with anything better
  • At that time people believed in “fixed species”
  • But…
charles darwin
Charles Darwin
  • Scientists realised that organisms could change
  • Started to ask where all the current living organisms had come from
  • Scientists started to construct phylogenies – lists or diagrams that showed evolutionary pathways taken by groups of organisms over many generations