The main event that stimulated the rapid development ofeukaryoteswas theacquisition of mitochondria.The acquisition ofmitochondriaplayed a critical role in theevolutionand success ofeukaryoticorganisms, providing them with a significant advantage in terms of energy generation and facilitating their evolution into complex,multicellularforms.Key points:Mitochondriaare organelles found in the cells ofeukaryoticorganisms and play a crucial role incellular respiration, which providesenergyto the cell.It is believed that mitochondria originated from analpha-proteobacteriumthat entered into asymbioticrelationship with anancestraleukaryotic cell.The symbiotic relationship between theeukaryoteand thebacteriumwas mutually beneficial, with the eukaryote gaining access to an increasedsource of energyand the bacterium gaining aprotected environmentwithin the eukaryotic cell.This acquisition ofmitochondriaallowed eukaryotes to evolve into more complex, multicellular organisms and made it possible for them tocolonizea wider range of environments and become the dominant form of life on Earth.Learn more aboutmitochondriahere:brainly.com/question/15159664#SPJ4...

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