Question

An analysis by Maria Rivera and James Lake suggests that ancient eukaryotic cells emerged from the fusion of an archaeal cell (most likely from the phylum Eocyta) and a bacterium (Rivera and Lake 2004). Which of the following is correct regarding this working hypothesis?

Answer 1

According to the serial endosymbiosis theory, an aerobic, heterotrophic bacterium was absorbed by a prokaryotic host cell hypothesis.

An aerobic, heterotrophic bacteria was swallowed by a eukaryotic host cell. An aerobic, photosynthetic bacterium was absorbed by a prokaryotic host cell. An aerobic, photosynthetic bacteria was swallowed by a eukaryotic host cell. The serial endosymbiotic theory, sometimes known as SET, explains how eukaryotic life evolved. The basic endosymbiosis mechanism, which states that an aerobic bacterium was phagocytosed by another cell of prokaryotic heterotrophic origin, is the foundation of the SET theory. Additionally, the swallowed cell survived on the chemical nutrients already present in the host cell rather of dying. The two cells underwent normal metabolism and proliferated hypothesis. The absorbed bacteria, which came from a heterotrophic source, was present in the host cell's progeny. The host cell has evolved throughout time. became reliant on the bacterium that had been phagocytosed to survive in the presence of atmospheric oxygen. Later, the bacteria that were swallowed took on the function of the mitochondria. Similar to this, the photosynthetic bacterium was successively consumed over time, creating the plastids hypothesis.

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