Animal and plant cell

Páginas: 2 (435 palabras) Publicado: 26 de septiembre de 2010
A eukaryote is an organism whose cells contain complex structures enclosed within membranes. The defining membrane-bound structure that sets eukaryotic cells apart from prokaryotic cells isthe nucleus, within which the genetic material is carried. Most eukaryotic cells also contain other membrane-bound organelles such as mitochondria, chloroplasts and the Golgi apparatus. Almost all species oflarge organisms are eukaryotes, including animals, plants andfungi, although most species of eukaryotic protists are microorganisms.
Eukaryotes appear to be monophyletic, and so make up one of thethree domains of life. Eukaryotes represent a tiny minority of all living things; even in a human body only a tenth of the cells are human.
The prokaryotes  are a group of organisms that lack a cellnucleus,or any other membrane-bound organelles. Most are unicellular, but a few prokaryotes such as myxobacteria have multicellular stages in their life cycles.
The prokaryotes are divided into twodomains: the bacteria and the archaea. Archaea were recognized as a domain of life in 1990. These organisms were originally thought to live only in inhospitable conditions such as extremesof temperature, pH, and radiation but have since been found in all types of habitats.
THE ANIMAL CELL
The Animal Cell is composed of Organelles which are small apparatus that perform specific tasks. The animal cellcontains the following organelles:
* Nucleus | stores the DNA of the cell and contains the following parts; |
* Chromatin | holds DNA and proteins |
* Nucleolus | is wherethe Ribosomal RNA is manufactured. |
* Golgi Apparatus | or Golgi Body prepares synthesised molecules for transport. |
* Lysosomes | contain enzymes and digest food and other dead organelles. |* Flagellum | small tail like extrusion used for motility. |
* Rough Endoplasmic Reticulum | synthesises proteins. |
* Smooth Endoplasmic Reticulum | synthesises lipids and...
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