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Properties of Stem Cells
Stem cells are defined by having 3 major properties:
1) They are capable of self-renewal.
2) They divide, some daughter cells give rise to cells that either maintain stem cell character
3) They can differentiate & give rise to differentiated cells. Mesenchymal Stem Cells (MSCs) have been identified in many tissues & are capable of differentiation into many lineages of cells when grow in defined conditions including osteogenic, chondrogenic, myogenic & neurogenic lineages
Ammonia Assimilation - Inorganic Nitrogen and Sulphur Metabolism Nitrogen (N 2 ) gas and NO 3 are the most common available forms of inorganic nitrogen. Both are enzymaticall
Types of cells in Phloem The phloem consists of 4 types of cells: i).sieve elements, ii) companion cells, iii) phloem parenchyma and sometimes iv) phloem fibres. The metabolit
Self- vs. Cross-Pollination A major advantage of self-pollination is its certainty. Continued self-pollination over many generations, however, results in weaker progeny. This
Define Genetic engineering and Biotechnology Genetic engineering or recombinant DNA technology, involves the use of a variety of enzymes, such as restriction endonucleass and
Birth control pills maintain a high blood level of estrogen and progesterone. What is happening in the ovary when the blood level of estrogen is high? How is the uterus responding?
Reaction specificity Some enzymes catalyze only one reaction acting on a specific substrate. Example: urease and catalase acts only on urea and hydrogen peroxide,
Pleural, Pericardial, and Ascitic fluid Collection: The procedure is called paracentesis . If for pleural cavity is called thoracocentesis , and for pericardial cavity c
Primitive Arthropods The primitive arthropods, Onychophora (for example Peripatus) have a series of paired legs which are not jointed but have a ringed appearance because of t
POR T AL CIRCULATION When a vein branches into set of capillary to distribute blood in some parts, such venous circulation is called portal system. Three types of portal syst
DEVELOPMENT OF PSYCHIATRIC NURSING IN OTHER COUNTRIES: Although the scientific findings rejected the belief that mental disturbance was the devil's work, the earliest asylums
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