You are looking at 1-20 of 428 entries  for:

  • All: prokaryote x
clear all

Did you mean prokaryotes prokaryotes

View:

Overview

prokaryote

Any organism in which the genetic material is not enclosed in a cell nucleus. Prokaryotes consist exclusively of bacteria, i.e. archaebacteria and eubacteria, which are now generally ...

prokaryote

prokaryote   Quick reference

A Dictionary of Genetics (8 ed.)

Reference type:
Subject Reference
Current Version:
2014
Subject:
Science and technology, Life Sciences
Length:
7 words

... member of the superkingdom Prokaryotes ( q.v....

prokaryote

prokaryote   Quick reference

A Dictionary of Biology (8 ed.)

Reference type:
Subject Reference
Current Version:
2019
Subject:
Science and technology, Life Sciences
Length:
61 words

...prokaryote ( procaryote ) Any organism in which the genetic material is not enclosed in a cell nucleus. Prokaryotes consist exclusively of archaea and bacteria , which are now classified in separate domains , Archaea and Bacteria . It is believed that eukaryotic cells ( see eukaryote ) evolved as symbiotic associations of prokaryotes ( see endosymbiont theory...

prokaryote

prokaryote   Reference library

Oxford Dictionary of Biochemistry and Molecular Biology (2 ed.)

Reference type:
Subject Reference
Current Version:
2008
Subject:
Science and technology, Life Sciences
Length:
54 words

... or procaryote any organism in which the genomic DNA is not enclosed by a nuclear membrane within the cells; i.e. any organism whose cells possess a prokaryon . The pro‐karyotes comprise the bacteria, cyanobacteria, and archaea and are classified in their own kingdom, variously named Monera or Procaryotae. Compare eukaryote . —prokaryotic or procaryotic ...

prokaryote

prokaryote   Quick reference

A Dictionary of Plant Sciences (4 ed.)

Reference type:
Subject Reference
Current Version:
2019
Subject:
Science and technology, Life Sciences
Length:
78 words

... A type of organism that is mainly unicellular and in which the cells lack a true nucleus ; in all known prokaryotes the DNA is present as a loop in the cytoplasm . Other prokaryotic features include the lack of chloroplasts and mitochondria and the possession of small ribosomes . The prokaryotes comprise two groups (domains): Bacteria (including the cyanobacteria , formerly known as ‘blue-green algae’) and Archaea ( see extremophiles...

prokaryote

prokaryote n.   Quick reference

A Dictionary of Psychology (4 ed.)

Reference type:
Subject Reference
Current Version:
2015

... n . A bacterium or a cyanobacterium (blue–green alga) composed of cells each containing genetic material in a single filament, not enclosed in a well defined nucleus ( 1 ) . Compare eukaryote . [From Greek pro before + karyon a...

prokaryote

prokaryote   Quick reference

A Dictionary of Geology and Earth Sciences (5 ed.)

Reference type:
Subject Reference
Current Version:
2020

... An organism, usually unicellular, in which the cells lack a true nucleus, the DNA being present as a loop in the cytoplasm. Other prokaryotic features include the lack of chloroplasts and mitochondria and the possession of small ribosomes. Compare eukaryote...

prokaryote

prokaryote   Quick reference

A Dictionary of Zoology (5 ed.)

Reference type:
Subject Reference
Current Version:
2020
Subject:
Science and technology, Life Sciences
Length:
71 words

... A single-celled organism in which the cell lacks a true nucleus and the DNA is present as a loop in the cytoplasm rather than as chromosomes bounded by a nuclear membrane. The prokaryotes comprise the Bacteria , which appear in the fossil record more than 3000 Ma ago and are the oldest forms of life known, and the cyanobacteria (also Bacteria), known from slightly younger...

prokaryote

prokaryote   Quick reference

World Encyclopedia

Reference type:
Subject Reference
Current Version:
2004
Subject:
Encyclopedias
Length:
105 words

... ( formerly Monera ) Any member of the biological kingdom (Prokaryotae); it includes bacteria and cyanobacteria (formerly blue-green algae). They are simple celled organisms. DNA is not contained in chromosomes in the nucleus , but lies in a distinct part of the cytoplasm , called the nucleoid. They have no distinct membrane-surrounded structures (organelles). Cell division is simple and, in the rare cases where sexual reproduction occurs, genetic material is simply transferred from one partner to another; there are no separate sex cells....

prokaryote

prokaryote   Quick reference

A Dictionary of Environment and Conservation (3 ed.)

Reference type:
Subject Reference
Current Version:
2017

... A single-celled organism that does not have a true nucleus containing genetic information, the DNA being present as a loop in the cytoplasm . See also eukaryote...

prokaryote

prokaryote   Quick reference

A Dictionary of Ecology (5 ed.)

Reference type:
Subject Reference
Current Version:
2015

... A unicellular organism, in which the cells lack a true nucleus, the DNA being present as a loop in the cytoplasm . Other prokaryotic features include the lack of chloroplasts and mitochondria and the possession of small ribosomes. Certain prokaryotes form filaments or colonies, but each cell remains capable of living independently, so the organism is not multicellular in the true sense. Prokaryotes are either Archaea or Bacteria...

prokaryote

prokaryote   Reference library

The New Oxford Dictionary for Scientific Writers and Editors (2 ed.)

Reference type:
Subject Reference
Current Version:
2009

... US: prokaryote or procaryote . Any organism in which the genetic material is not enclosed in a cell nucleus. Formerly grouped in a single domain ( Procaryotae ; not Prokaryotae), the prokaryotes are now classified into two domains, the *Archaea and the *Eubacteria . Adjectival form: prokaryotic...

prokaryote

prokaryote noun   Quick reference

New Oxford American Dictionary (3 ed.)

Reference type:
English Dictionary
Current Version:
2015
Subject:
English Dictionaries and Thesauri
Length:
75 words
prokaryote

prokaryote noun   Quick reference

Oxford Dictionary of English (3 ed.)

Reference type:
English Dictionary
Current Version:
2015
Subject:
English Dictionaries and Thesauri
Length:
79 words
prokaryote

prokaryote noun   Reference library

The New Zealand Oxford Dictionary

Reference type:
English Dictionary
Current Version:
2005
Subject:
English Dictionaries and Thesauri
Length:
43 words
prokaryote

prokaryote noun   Reference library

Australian Oxford Dictionary (2 ed.)

Reference type:
English Dictionary
Current Version:
2004
Subject:
English Dictionaries and Thesauri
Length:
43 words
prokaryote

prokaryote noun   Reference library

The Canadian Oxford Dictionary (2 ed.)

Reference type:
English Dictionary
Current Version:
2005
Subject:
English Dictionaries and Thesauri
Length:
49 words
prokaryote nomenclature

prokaryote nomenclature   Reference library

The New Oxford Dictionary for Scientific Writers and Editors (2 ed.)

Reference type:
Subject Reference
Current Version:
2009

... nomenclature The naming of prokaryotes (i.e. bacteria and archaea) is prescribed by the International Code of Nomenclature of Prokaryotes (formerly the International Code of Nomenclature of Bacteria ), otherwise known as the Bacteriological Code . Each species is given a Latinized binomen ( see binomial nomenclature ), consisting of the genus name and a specific epithet; e.g. Clostridium difficile . The names of taxa above the rank of genus are formed by adding an appropriate suffix to the stem derived from the name of the type genus ( see ...

prokaryote

prokaryote  

Any organism in which the genetic material is not enclosed in a cell nucleus. Prokaryotes consist exclusively of bacteria, i.e. archaebacteria and eubacteria, which are now generally classified in ...
prokaryotes

prokaryotes   Quick reference

A Dictionary of Biomedicine (2 ed.)

Reference type:
Subject Reference
Current Version:
2019

...prokaryotes The unicellular organisms, bacteria and archaea , that form two of the three main domains of living organisms (the third being eukaryotes )....

prokaryotes

prokaryotes   Quick reference

A Dictionary of Dentistry (2 ed.)

Reference type:
Subject Reference
Current Version:
2020
Subject:
Medicine and health, Dentistry
Length:
143 words

... pl. n. ( adj. prokaryotic ) A group of organisms that do not have a cell nucleus or membrane-bound organelles. Most prokaryotes are unicellular and their DNA exists as a single chromosome that is not bounded by a nuclear membrane as occurs in eukaryotes . Prokaryotes do not differentiate into multicellular forms and lack structural diversity. Prokaryotes are divided into two domains called bacteria and archaea , both of which have evolved differently. Bacteria are ubiquitous throughout the world and are essential for the recycling of...

View: