Unit 2 – Biodiversity
Drugs from plants
Species and biodiversity
Natural selection and Evolution
Conservation and genetic diversity
Plant cell structure
Plant stem structure and function
Starch, cellulose and fibres
, New Taxonomic grouping
Three domains have been identified based on
molecular phylogeny compares the structure of a
particular molecule from different organisms to
discover their degree of evolutionary relatedness
The more similar the structure of the molecule, the
more closely related the organisms are to each other
This is because changes in molecule structure
generally occur only slowly as they are caused by
mutations
, New Taxonomic grouping
Three Domains
• Bacteria
• Archaea
• Eukaryota
The idea of the three domains illustrates the scientific
process and the important role of critical evaluation of new
data by the new scientific community
Kingdom
Phylum Classification
Class
Order Order
Family
Genus
Species
, Discovery of Archaea
All life is split into prokaryotes and eukaryotes
A scientist called Woese suggested a third group which
he called the Archaea. Woese published a paper in a
scientific journal using molecular phylogenic evidence
Other scientists study the evidence carefully peer
review
Other scientists start to collect evidence
Drugs from plants
Species and biodiversity
Natural selection and Evolution
Conservation and genetic diversity
Plant cell structure
Plant stem structure and function
Starch, cellulose and fibres
, New Taxonomic grouping
Three domains have been identified based on
molecular phylogeny compares the structure of a
particular molecule from different organisms to
discover their degree of evolutionary relatedness
The more similar the structure of the molecule, the
more closely related the organisms are to each other
This is because changes in molecule structure
generally occur only slowly as they are caused by
mutations
, New Taxonomic grouping
Three Domains
• Bacteria
• Archaea
• Eukaryota
The idea of the three domains illustrates the scientific
process and the important role of critical evaluation of new
data by the new scientific community
Kingdom
Phylum Classification
Class
Order Order
Family
Genus
Species
, Discovery of Archaea
All life is split into prokaryotes and eukaryotes
A scientist called Woese suggested a third group which
he called the Archaea. Woese published a paper in a
scientific journal using molecular phylogenic evidence
Other scientists study the evidence carefully peer
review
Other scientists start to collect evidence
