The Rise of Eukaryotic Cells and the Boring Billion

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Last updated 1:19 PM on 5/21/26
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6 Terms

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When did eukaryotic cells evolve

~1.8 billion years ago

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What are eukaryotes

Contain membrane bound organelles, housing genetic material within a defined nucleus. They are larger, more complex cells with greater energy efficiency.

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What is endosymbiosis

The process where a larger cell engulfed smaller prokaryotic cells. It allowed for more efficient energy production and contributed to the rise of larger and more complex organisms.

<p>The process where a larger cell engulfed smaller prokaryotic cells. It allowed for more efficient energy production and contributed to the rise of larger and more complex organisms.</p>
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What is the evidence for endosymbiosis

Mitochondria and chloroplasts are believed to have originated as free-living bacteria, which became permanent residents of the host cell. Mitochondria and chloroplasts have their own DNA, similar to certain bacteria.

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When did the Boring Billion take place

~1.8 to 0.8 billion years ago

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What is the Boring Billion

The delay in the evolution of complex life, primarily due to low levels of oxygen in the atmosphere

<p>The delay in the evolution of complex life, primarily due to low levels of oxygen in the atmosphere</p>