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Embryology

Embryology. Can you tell what this organism is?. You will notice similarities among organisms in their early stages. The similar embryo development means they all descend from a common ancestor. The similarities amongst organisms fades as the organism develops. Embryology.

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Embryology

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  1. Embryology

  2. Can you tell what this organism is?

  3. You will notice similarities among organisms in their early stages. The similar embryo development means they all descend from a common ancestor The similarities amongst organisms fades as the organism develops.

  4. Embryology • Embryology - Study of how multicellular organisms grow and develop (prebirth) • Embryo - an unborn or unhatched offspring in the process of development • What does it mean to grow and develop in biology? • Grow = to undergo cell division (increase in the number of cells) • Develop = differentiation usually due to gene regulation • Complexity in the organism

  5. What is an comparative embryology? • Comparative embryology – to compare and contrast embryos of different species

  6. Phylogeny means evolutionary branching. Simply stated the relationship between these organisms. Ontogeny means the development of an individual organism

  7. CER • Which organism is most closely related to the human?

  8. How does comparative embryology show support for evolution? • All embryos look similar, regardless of the organism. • These similarities are evidence for evolution. • The embryos look similar because all organisms come from a common ancestor

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