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Feel free to reply to any comment by clicking the "Reply" button.The bottom middle was probably the model for ET
CallMeDave
Level 8
Feb 22, 2019
1
This concept is called ontogeny. Most fetus in the subPhylum Vertebrata form similarly until the later stages of the fetal devolpment.
For awhile there was a saying in biology; "Ontogeny recapitulates Phylogeny". This meant the stages of fetal development followed a pattern that was reflective of thier evolutionary development from fish to mammal. This saying no longer in favor in the evolutionay Biology ranks.
t1nick
Level 8
Feb 18, 2019
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