Common ancestry and evolutionary trees | Evolution | Middle school biology | Khan Academy

Evolutionary trees model the relationships between lineages and their common ancestors.

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Credits:

“Pigeons on the roads of Old city, Hyderabad” by iMahesh (CC BY-SA 4.0), via Wikimedia Commons:

“Brown Mesite - Ranomafana - Madagascar_MG_1281” by Francesco Veronesi (CC BY-SA 2.0), via Wikimedia Commons:

“Double-banded Sandgrouse (Botswana)” by Marie de Carne (CC BY-SA 3.0), via Wikimedia Commons:

“Tyrannosaurid specimen FMNH PR308 on display at the Field Museum of Natural History in Chicago, Illinois, USA” by Evolutionnumber9 (CC BY-SA 4.0), via Wikimedia Commons:

“India - Delhi girls chasing doves” by Jorge Royan (CC BY-SA 3.0), via Wikimedia Commons:

[winkland]

What program/equipment do you use to make these annotated videos?

[muhammadisaac]

Views are really less compared to the quality of the video

[micdeymearstienbeiger]

• The placental saber-tooth cat (which is actually closer to a kangaroo) and the marsupial saber-tooth cat look almost the same anatomically. Yet, they don't have common ancestor. This homoplasy is yet more clear evidence against common ancestry.
• Bats and dolphins both have the same echolocation genes even though they do not share common ancestor. This is genetic similarity. But it shouldn't be so if common ancestry is true. This homoplasy is actually clear evidence against common ancestry.
• Pac6 genes (for eye development) exist in both fruit flies and humans, yet they don't have common ancestor. This homoplasy is yet more clear evidence against common ancestry.

Why do evolutionists ignore such evidence? Existence of homoplasy is evidence against common ancestry, which the evolutionists try to twist and turn to explain it away.
The Convergent Evolution Theory & homoplasy (which is similarities without common descent). Homoplasy exists at the genetic, physical, and biochemical levels. This clearly challenges common ancestry or common descent.

Homology actually contradicts homoplasy. Both exist naturally. Therefore, one cannot be used to establish common ancestry while ignoring the other. Moreover, homology assumes common ancestry or descent is true, which leads to circular reasoning!