Navigation Links
Cell division


Cell division is the process of a biological cell (called a mother cell) dividing into two daughter cells. This leads to growth in multicellular organisms (the growth of tissue) and to procreation (vegetative reproduction) in unicellular organisms.

Prokaryotic cells divide by binary fission. Eukaryotic cells usually undergo a process of nuclear division, called mitosis, followed by division of the cell, called cytokinesis. A diploid cell may also undergo meiosis to produce haploid cells, usually four. Haploid cells serve as gametes in multicellular organisms, fusing to form new diploid cells.

Multicellular organisms replace worn-out cells through cell division. However, in some animals, cell division eventually halts, and the cell is then referred to as senescent. Senescent cells deteriorate and die, causing the body to age. Cells stop dividing because the telomeres, protective bits of DNA on the end of a chromosome, become shorter with each division and eventually can no longer protect the chromosome. Cancer cells, on the other hand, are "immortal." An enzyme called telomerase allows them to continue dividing indefinitely.

See also

External link


'"/>


(Date:12/17/2014)... 15, 2014 Research and Markets ... the "Samsung Galaxy S5 - Home Button ... their offering. http://photos.prnewswire.com/prnh/20130307/600769 ... sensing technology than the iPhone 5S, Samsung introduces ... its product. The Galaxy S5 home ...
(Date:12/17/2014)... , Dec. 15, 2014  HITLAB SM ... Clinical Practices (GCP) audit to confirm its adherence ... regulations. This accomplishment enables HITLAB to conduct regulated ... the highest principles for patient safety and research ... global healthcare access, quality, and delivery with innovative ...
(Date:12/17/2014)... 2014 Research and Markets ( ... "Global Chemical Sensor Market 2015-2019" report ... http://photos.prnewswire.com/prnh/20130307/600769 One major trend upcoming ... medical sensors in biomedical applications. Chemical sensors help ... correct diagnosis during surgical procedures. The Global Chemical ...
Breaking Biology News(10 mins):Samsung Galaxy S5 - Home Button Synaptics Fingerprint Sensor Technology Analysis 2HITLAB Completes GCP Audit for FDA Smart Device & App Compliance 2Global Chemical Sensor Market 2015-2019: Key Vendors are Abbott Laboratories, Bayer, Hoffmann La-Roche, Johnson & Johnson, NGK Spark Plugs and Robert Bosch 2
... currently accepted norms of biofuel production. A commentary published ... of greenhouse gas (GHGs) emissions from bioenergy production are ... of the benefits of biofuels compared to fossil fuels. ... Analysis models of bioenergy production. Life Cycle Analysis (LCA) ...
... be as common as initial HIV infection and is ... study led by researchers at the Johns Hopkins Bloomberg ... Allergy and Infectious Diseases (NIAID). In the first large-scale ... researchers examined the rate of superinfection among a community ...
... with discarded plastics, scientists have been working to produce ... Tel Aviv University researcher is giving the quest for ... making them tougher than ever before. Prof. ... a super-strength polypropylene one of the world,s most ...
Cached Biology News:Environmental benefit of biofuels is overestimated, new study reveals 2New data suggests HIV superinfection rate comparable to initial HIV infection 2New data suggests HIV superinfection rate comparable to initial HIV infection 3Steel-strength plastics -- and green, too! 2Steel-strength plastics -- and green, too! 3
Other biology definitionOther Tags