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Evidence of Evolution Outline evidence that present day organisms have developed from different organisms in the distant past. Fossils can be placed in a time sequence to see patterns. Relative dating Law of superposition (generally shows a progression from simple life forms to more

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slide1

Evidence of EvolutionOutline evidence that present day organisms have developed from different organisms in the distant past

fossils can be placed in a time sequence to see patterns
Fossils can be placed in a time sequence to see patterns
  • Relative dating

Law of superposition

(generally shows a

progression from simple

life forms to more

complex life forms

  • Now we can place

absolute times on

may fossils by

Radiometric Dating

transition fossils
Transition fossils

Provide a suggested pathway for evolutionary change.

Archaeopteryx

Birds evolved from reptiles

slide4

Skeletons of

Crossopterygious (lobed fish)

and amphibians

show many similarities. Convincing argument for relations

  • Comparison of present day organisms with fossils of past
  • organisms show changes that have occurred over time.
  • Skeletal comparisons are often used as evidence of possible
  • Lineages.
biogeography
Biogeography
  • Is the Study of the distribution of living things.

Distribution of similar plants and animals across the world suggests that after the break up of super continents (eg Gondwana), evolution has continued resulting in small changes of species as a result of changes in environmental conditions

  • Oreocallis: Peru Ecuador,
  • New Guinea and parts of Australia

Embothrium: Chilie, Argentina

slide6

Tasmanian Waratah

Gippsland Waratah or Victorian Waratah. Northeast NSW

New South Wales Waratah. East New South Wales.