Understandings:
5.4.U1: A clade is a group of organisms that have evolved from a common ancestor.
5.4.U2: Evidence for which species are part of a clade can be obtained from the base sequences of a gene or the corresponding amino acid sequence of a protein.
5.4.U3: Sequence differences accumulate gradually so there is a positive correlation between the number of differences between two species and the time since they diverged from a common ancestor.
5.4.U4: Traits can be analogous or homologous.
5.4.U5: Cladograms are tree diagrams that show the most probable sequence of divergence in clades.
5.4.U6: Evidence from cladistics has shown that classifications of some groups based on structure did not correspond with the evolutionary origins of a group or species.
Applications:
5.4.A1: Cladograms including humans and other primates.
5.4.A2: Reclassification of the figwort family using evidence from cladistics.
Skills
5.4.S1: Analysis of cladograms to deduce evolutionary relationships.
Nature of Science:
5.4.NOS: Falsification of theories with one theory being superseded by another- plant families have been reclassified as a result of evidence from cladistics.
[Text in square brackets indicates guidance notes]
5.4.U1: A clade is a group of organisms that have evolved from a common ancestor.
5.4.U2: Evidence for which species are part of a clade can be obtained from the base sequences of a gene or the corresponding amino acid sequence of a protein.
5.4.U3: Sequence differences accumulate gradually so there is a positive correlation between the number of differences between two species and the time since they diverged from a common ancestor.
5.4.U4: Traits can be analogous or homologous.
5.4.U5: Cladograms are tree diagrams that show the most probable sequence of divergence in clades.
5.4.U6: Evidence from cladistics has shown that classifications of some groups based on structure did not correspond with the evolutionary origins of a group or species.
Applications:
5.4.A1: Cladograms including humans and other primates.
5.4.A2: Reclassification of the figwort family using evidence from cladistics.
Skills
5.4.S1: Analysis of cladograms to deduce evolutionary relationships.
Nature of Science:
5.4.NOS: Falsification of theories with one theory being superseded by another- plant families have been reclassified as a result of evidence from cladistics.
[Text in square brackets indicates guidance notes]
Mr Leonard's 5.4 Tutorial & Guided Notes
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