单词 | prokaryote |
释义 | prokaryote (once / 5909656 pages) n A prokaryote is a single-celled organism that doesn't have a nucleus. Bacteria are one familiar type of prokaryote. If you take a biology class, you're likely to learn about prokaryotes, tiny organisms without a distinct nucleus bound by a membrane, like most other living things. Prokaryotes are often contrasted with the single-celled or multicellular eukaryotes, which do have a nucleus. The word prokaryote is rooted in Greek — it combines the word pro, "before," with karyon, "nut or kernel." WORD FAMILYprokaryote: prokaryotic USAGE EXAMPLESOne prokaryote engulfed another, and instead of digesting it, he put the little guy to work. Washington Post(May 12, 2016) Lokiarchaeota do not possess them - making this organism no different from any other prokaryote. BBC(May 06, 2015) The consensus is that the first eukaryote was a prokaryote which engulfed, but failed on several occasions to digest, other prokaryotes. Economist(Nov 06, 2014) n a unicellular organism having cells lacking membrane-bound nuclei; bacteria are the prime example but also included are blue-green algae and actinomycetes and mycoplasma Syn|Ant|Hyper procaryote eucaryote, eukaryote an organism with cells characteristic of all life forms except primitive microorganisms such as bacteria; i.e. an organism with `good' or membrane-bound nuclei in its cells being, organism a living thing that has (or can develop) the ability to act or function independently |
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