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Prokaryotes Meaning: Definition, Examples, and Translations

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prokaryotes

[proʊˈkær.i.oʊts ]

Definition

Context #1 | Noun

biology

Prokaryotes are single-celled organisms that lack a nucleus and other membrane-bound organelles. They are typically smaller and simpler in structure compared to eukaryotic cells.

Synonyms

archaea, bacteria, single-celled organisms.

Examples of usage

  • Prokaryotes such as bacteria and archaea are found in various environments, from deep-sea vents to the human gut.
  • The study of prokaryotes is important for understanding the evolution of life on Earth.

Translations

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Interesting Facts

Biology

  • Prokaryotes include bacteria and archaea, which are found in diverse habitats, from soil to extreme environments like hot springs.
  • Unlike eukaryotic cells, prokaryotic cells lack membrane-bound organelles, making them simpler in structure.

Evolutionary Significance

  • Prokaryotes are believed to have appeared around 3.5 billion years ago, making them one of the oldest life forms on Earth.
  • Their ability to thrive in extreme conditions has important implications for understanding early life and the potential for life on other planets.

Ecological Impact

  • Some prokaryotes are essential in nutrient cycling, decomposing organic material, and fixing nitrogen in the soil, which is crucial for plant growth.
  • They can form symbiotic relationships with other organisms, including humans, aiding in digestion and contributing to gut health.

Applications in Science

  • Prokaryotes are widely used in genetic engineering, such as E. coli bacteria, which can be modified to produce insulin.
  • They are also key in biotechnology for producing biofuels and in bioremediation to clean up environmental contaminants.

Origin of 'prokaryotes'

Main points about word origin

  • The term 'prokaryote' comes from Greek, where 'pro' means 'before' and 'karyon' means 'nut' or 'kernel', referring to cell structure.
  • The distinction between prokaryotes and eukaryotes was first established by scientists in the 19th century, highlighting the simplicity of these organisms.

The term 'prokaryote' comes from the Greek words 'pro' meaning before and 'karyon' meaning nucleus. It was first introduced in 1925 by French biologist Edouard Chatton to distinguish between simple cells without a nucleus (prokaryotes) and complex cells with a nucleus (eukaryotes). Prokaryotes are believed to have been the first forms of life on Earth, appearing around 3.5 billion years ago.

Word Frequency Rank

At rank #29,551, this word represents specialized academic or technical vocabulary. It's less frequently encountered but may be valuable in specific contexts.