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Window Help 60 usatestprep.com Women's Tops Urban Outfitters Free People × USATestpreg, LLC.·Online State-S- ASSIGNMENT All life on Earth started as unicelluar, prokaryotic organisms. Which of these structures was vital for organisms to develop in order to evolve into more complex, multicellular organisms? )nucleus B) ribosomes O cytoplasm D) cell membrane Submit Evolution TEACHER-EMPOWERED, TEACHER-DEVELOPED, EASY-TO-USE We d Love to Hear from You PHON?-877-377-9537 FAX 1-877-816-0eos?CONTACLs TV y p. LLC 2018, All Rights Reserwed Privacy Poicy wwt

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Ans. Correct option- A. Nucleus. Evolution of more complex eukaryotes from prokaryotes is characterized by formation of nuclear membrane around the genetic material. That is, prokaryotes lack the nuclear membrane around their genetic material whereas eukaryotes have it. Evolution of nucleus further leads to the development of endomembrane system that compartmentalizes the eukaryotic cell- each compartment doing its own specialized function.

# Both the prokaryotic and eukaryotic cells have ribosomes (though different types), cytoplasm and cell membrane, and do not signify greater evolutionary difference between the two types of cells than the nucleus do.

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