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kajumbi kajumbi
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5 years ago
What evidence would support the hypothesis that larger cells evolved in part by engulfing other, smaller cells.
Textbook 

Biology: The Core


Edition: 2nd
Author:
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SKDSKD
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5 years ago
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Eukaryotic cells have several organelles (nucleus, mitochondria, chloroplasts) that contain a double membrane and have their own DNA. The DNA of the mitochondria and chloroplasts are arranged in plasmids, resembling the DNA of bacteria. They even divide like bacteria. Their smaller size, double walls, and plasmid DNA suggest they were absorbed by endocytosis, but instead of being digested, they were assimilated as powerhouse organelles. The symbiotic relationship evolved to the point where they became a single organism. Additionally, the smaller and simpler prokaryotic cells were on the planet for 2 billion years before the larger, more complex eukaryotic cells, giving them sufficient time to evolve.
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