Paradox of biodiversity consists of all types of plants and animals in which I tell you about difference interesting facts about living forms that exist in the world. Also that knowledge is useful for you .




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Wednesday, March 13, 2019

Cell : basic unit of life

              Cell : the unit of life 

All organisms are composed of cells .some are composed of single cells called unicellular while others are composed of many cells called multicellular organisms.

What is cell ? 
Cell is a fundamental, structural and functional unit of all living organisms.
* Anton von Leeuwenhoek first saw and described a live cell while Robert brown later discovered the nucleus.

Structure of cell
Cells of human cheeks have an outer  membrane . Inside each cell is a dense membrane bound structure called nucleus . The contains the chromosomes which in turn take genetic material , DNA cells that have membrane bound nuclei are called eukaryotic whereas cells that a lack of membrane are prokaryotic.
Cells differ greatly

For example: 
The largest isolated single cell is the egg of ostrich.
The cells are vary greatly in shape they may be disc like, polygonal , cuboid , thread like or even irregular. The cells vary with the function they perform.

Eukaryotic cells include all protists, plants , animals and fungi .
While prokaryotic calls include bacteria, blue- green algae , microplasma and PPLO.

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