1 / 6

Unraveling Endosymbiotic Theory: Origins of Eukaryotic Cells

Discover the fascinating concept of endosymbiosis and the Endosymbiotic Theory, which explains the origin of eukaryotic cells and membrane-bound organelles. Explore how prokaryotic cells engulfed each other to create the first eukaryotic cells. Learn about the evolution of chloroplasts, mitochondria, and more supported by circular DNA, ribosomes, and binary fission.

brianj
Download Presentation

Unraveling Endosymbiotic Theory: Origins of Eukaryotic Cells

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Endosymbiotic Theory

  2. Endosymbiosis • Symbiosis, which means "living together" is an ecological interaction in which two or more species live in or on each other in close contact. Thus, endosymbiosis is when an organism actually lives within another organism.

  3. The Endosymbiotic Theory • The endosymbiotic theory is the idea that a long time ago, prokaryotic cells engulfed other prokaryotic cells by endocytosis. This resulted in the first eukaryotic cells. • First proposed by Lynn Margulis • Explains the origin of eukaryotic cells • Explains the origin of certain membrane-bound organelles

  4. What Exactly Happened? Chloroplast Plants and plant-like protists Ancient Prokaryotes Heterotrophic bacteria Photosynthetic bacteria Nuclear envelope evolving Mitochondrion Primitive Autotrophic (Photosynthetic) Eukaryote Animals, fungi, and animal-like protists Ancient Heterotrophic Prokaryote Primitive Heterotrophic Eukaryote

  5. Evidence in support of the endosymbiotic theory: • Similarities between mitochondria, chloroplasts, & prokaryotes: • Circular DNA • Ribosomes • Binary fission

  6. Explain theEndosymbiotic Theory. What does “symbiosis” mean? Based on this theory, how did chloroplasts and mitochondria arise? Questions

More Related