Eukaryota
Eukaryota
Eukaryota (pronounced: yoo-kar-ee-OH-ta) is a term derived from the Greek words 'eu' meaning true, and 'karyon' meaning kernel or nucleus. It is a domain of organisms that have complex cells, or eukaryotic cells, with a nucleus enclosed within membranes.
Definition
Eukaryota are organisms whose cells have a nucleus enclosed within membranes, unlike Prokaryotes, which have no membrane-bound organelles. Eukaryotes belong to the domain Eukaryota or Eukarya, and their name comes from the Greek εὖ and κάρυον. The domain Eukaryota appears to be monophyletic, and makes up one of the domains of life in the three-domain system.
Characteristics
Eukaryotic cells are larger than prokaryotic cells and have a "true" nucleus, membrane-bound organelles, and rod-shaped chromosomes. The nucleus houses the cell's DNA and directs the synthesis of proteins and the process of cell division.
Classification
Eukaryotes are classified into three main groups: Plants, Animals, and Fungi. Each of these groups also includes various subgroups.
Etymology
The term "Eukaryota" is derived from the Greek words 'eu' meaning true, and 'karyon' meaning kernel or nucleus, referring to the presence of the nucleus in these cells.
Related Terms
External links
- Medical encyclopedia article on Eukaryota
- Wikipedia's article - Eukaryota
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