Claim: Prokaryotic cells evolved into eukaryotic cells with organelles, which ultimately led to the development of multicellular organisms, as evidenced by the Endosymbiotic Theory and the structural and functional complexities observed in eukaryotic cells.
The foundation of this claim lies in the principles of Cell Theory and the Endosymbiotic Theory. Cell Theory posits that all living organisms are composed of cells, which serve as the basic