Wednesday, May 29, 2013

Eukaryotes

 Eukaryote cells are found as protists, fungi, plants and animals. They are either unicellular, colonic or multi cellular. They have a nucleus bound by a double membrane, in some cases it´s just a single membrane. They are much more complex in comparison to prokaryotic cells. They have a variety of internal structures called organelles and have a cytoskeleton. Eukaryote DNA is divided up into several linear bundles called chromosomes.

Eukaryotes reproduce through meiosis, which is a process in which each daughter cell receives a copy of one of the parents chromosomes.

Differences among Eukaryote cells

Three types of these cells exist:

1. Animal cells: These cells make up the tissues in an animal body. Unlike plant cells and fungal cells they lack a cell wall and chloroplasts. Since it lacks a cell wall it can adopt many shapes, phagocyte cells (white blood cells) can engulf other structures as well.



2. Plant cells: They have a cell wall and chloroplast which they use in photosynthesis for food. They are strictly bound to one shape unlike animal cells.



3. Fungal cells: Fungal cells are similar to animal cells except they have a cell wall which contains chitin (a derivative of glucose). Also Higher fungi also have porous parts called septa, which allows cytoplasm, organelles and nuclei (only sometimes) to pass through.


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