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Regeneration - Root and Shoot Morphogenesis
Higher plants have three kinds of regenerative activities;
All plants possess inherent ability to regenerate lost parts. For example when a part of mature tissues are removed from stem, the exposed mature cells undergo differentiation, division and re-differentiation to restore the normal pattern. When a branch is cut and wound is made-damaged tissues are cast off and new cells take this place. A wound also results in the formation of a zone of cells that form a thick protective layer. Induction of hormones like auxins and cytokinins that promote cell division is also a reaction to wound and part and parcel of regeneration. Mobilization of nutrients towards the site of injury, synthesis of new hormones, increased cell division and thickening of cell walls etc. are some of the responses and contribute to regeneration.
Q. Do sponges have circulatory, nervous and excretory systems? Sponges do not have a nervous system neither excretory system nor circulatory system.
Life forms are significant because
Cholesterol, from stereos (solid) and the Greek chole- (bile) followed by the chemical suffix -ol for an alcohol is an organic chemical substance classified as a waxy steroid of fa
What are the chemical elements that form most of living biological matter? The elements are:- a) oxygen (O), b) carbon (C), c) hydrogen (H) and d) Nitrogen (N).
Q. Are there non viral hepatitides? The Hepatitis is a generic name for inflammation of the liver and there are bacterial hepatitides, for instance, in lepstopirosis, and toxic
Why is it more probable that the photosynthetic prokaryotes appeared before the aerobic eukaryotes? It is more feasible that photosynthetic prokaryotes appeared before the aero
Define functions of carbohydrate - Protein sparing effect? Carbohydrates help in regulating the protein metabolism. Presence of sufficient carbohydrates to meet energy demands
conductometry and its uses in biology
Insulin Concentrations The doctor always prescribes insulin dosage in units. Thus all types of insulin (crystalline, NPH, Lente, and so forth) is available in 10-ml vials that
Density Independent Factors Density independent factors are the extrinsic factors which tend to regulate the density of a population in ways that are not correlated with its
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