Evidence for Evolution Group 1 by Heather Murray https://padlet.com/hglenville/kxke0rlpfhuwosmu en-us 2022-02-23 14:33:58 UTC 2024-02-13 15:25:58 UTC hello@padlet.com homologous structures - comparative anatomy https://padlet.com/hglenville/kxke0rlpfhuwosmu/wish/2882348364 They are basically similar structures that are found in like a number of different species. For example the pentadactyl limb which is a limb with five digits. This is found in humans with our hands and our feet ... but is also found in other animals such as dogs, cats, bats, birds, and even whales.


These limbs are different though like they aren't identical obviously. So even if they have the same root they like adapt to the environment and the needs of that specific animal. Examples would be bats use their pentadactyl limb for flying while dogs use it for running.



]]> 2024-02-13 15:25:58 UTC https://padlet.com/hglenville/kxke0rlpfhuwosmu/wish/2882348364 Fossil Record https://padlet.com/hglenville/kxke0rlpfhuwosmu/wish/2882348886

  • Heritable characteristics change over time

  • Fossils contain molds, imprints, casts, and preserved organisms

  • Trace fossils include footprints, faeces, and burrows

  • Form in sedimentary rock and get trapped in layers called strata

  • Pressed into Earth

  • Fossils records are incomplete as only parts of organisms can be preserved

  • Shows evolutionary transitions

  • Called transitional fossils

  • Shows similarities between transitions groups and ancestors... evidence for macroevolution

  • Ex. Archaeopterix shows transition from reptile to bird

  • Based on understanding of geology

  • Geologists interpret fossils found in strata

  • Carbon dating determines which organisms found in fossils came first

  • Now, we use radioisotope dating

  • Evidence can develop with the advancement of technology

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