🔬Eukaryote vs Prokaryote🦠
Every living thing is built from one of two cell types. Prokaryotes are simple and ancient, while eukaryotes are larger and compartmentalized.
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🔬Eukaryote
- ✓Has a true membrane-bound nucleus
- ✓Contains organelles like mitochondria and ER
- ✓Generally larger (10-100 micrometers)
- ✓Includes animals, plants, fungi and protists
- ✓DNA is linear and packaged into chromosomes
🦠Prokaryote
- ✓No nucleus — DNA floats freely in the cytoplasm
- ✓Lacks membrane-bound organelles
- ✓Generally smaller (1-10 micrometers)
- ✓Includes all bacteria and archaea
- ✓DNA is usually a single circular molecule
Verdict
Prokaryotes were Earth's first life and still dominate by number. Eukaryotes evolved later with internal compartments that allowed complex multicellular organisms. Both remain essential to the biosphere.
Frequently asked
Which cell type is older?+
Prokaryotes appeared first, around 3.5 billion years ago; eukaryotes evolved roughly 2 billion years ago.
Do prokaryotes have any organelles?+
They have ribosomes, but no membrane-bound organelles like mitochondria or a nucleus.
What is endosymbiotic theory?+
It proposes that eukaryotic mitochondria and chloroplasts originated from once free-living prokaryotes.
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