eucaryote
Học thuậtThân thiện
Definition
Noun: 1. An organism whose cells contain a membrane-bound nucleus and other distinct organelles: A eucaryote is a life form composed of one or more cells that have a clearly defined nucleus, enclosed by a nuclear membrane, and specialized structures (organelles) such as mitochondria. This group includes all complex life forms like animals, plants, fungi, and protists, distinguishing them from simpler organisms like bacteria (prokaryotes).
Examples of Usage
- Noun:
- Animals and plants are both examples of a eucaryote.
- The defining feature of a eucaryote is the presence of a true nucleus within its cells.
- Scientists study the evolution of the eucaryote from simpler prokaryotic ancestors.
Advanced Usage
- "Eucaryotic" (adjective): Describes the characteristic cell type of a eucaryote.
- The eucaryotic cell is more structurally complex than a prokaryotic cell.
- In biological classification, the term is central to the fundamental division of life. The formal taxonomic domain is Eukarya.
Variants and Related Words
- Eukaryote: This is the more common modern spelling. "Eucaryote" and "eukaryote" are synonyms.
- Eukaryotic (adj): The adjectival form corresponding to "eukaryote".
- Prokaryote (n): The antonym; an organism (like a bacterium) whose cells lack a membrane-bound nucleus.
Synonyms
- Eukaryotic organism
- Nucleated cell organism
Related Concepts and Contrasts
- Cell nucleus: The membrane-bound organelle that houses genetic material in a eucaryote.
- Organelle: A specialized structure within a eucaryotic cell, such as a mitochondrion or chloroplast.
- Prokaryote: The contrasting category of organisms (bacteria and archaea) that lack a membrane-bound nucleus and other complex organelles. The comparison "eucaryote vs. prokaryote" is fundamental in biology.
Noun
- 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