A Eukaryote is any organisam whose cell contains a nucleus and other organelles enclosed within the membranes. The defining features that sets eukariotic cell apart from the prokaryotic cells ( Bacteria and Archeae ) is that they have membrane bond organelles, especially the nucleus, which contains the genetic material and is enclosed by the nuclear envelope. Eukaryotic cells also contain other membrane bound organelles such as mitochondria and the golgi apparatus. In addition, plants and algae contain chloroplast. Eukaryotic organisams may be unicellular or they may also be multicellular. Only eukaryotic cells form multicellular organisams consisting of many kinds of tissues made up of different cell types. Eukariotic cells can reproduce both asexually through mitosis and sexually through meiosis and gamete fusion. In mitosis, one cell divides to produce two genetically identical cells. In meiosis, DNA replication is followed by two rounds of cell division to produce 4 daughter cells each with half the numbers of chromosomes as the original parent cell ( haploids cells ). These act as sex cells. All animal consist of eukaryotic cells. Due to the lack of a cell wall, animal cells can adopt a variety of shapes. A phagocytic can even engulf other structures.