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Q. How can an organism that once underwent contact with an antigen be immunized against future infections by the same agent?
This phenomenon is called as immune memory when an antigen makes contact for the first time with cells of the humoral immune system B lymphocytes that are producers of specific immunoglobulins against that antigen multiply and in days synthesize their antibodies this is called as primary response. Few of these specific B lymphocytes remain in the circulation for a long time, sometimes during the entire life of the individual, and they become the memory cells of the immune system when the body is exposed in the future to the same antigen the production of antibodies will be more intense and faster since the immune system is already prepared to react against that antigen this is called as the secondary response.
Q. What is biodiversity? The Biological diversity is the variety of species of living beings of an ecosystem. In the ecosystems which are more biodiverse, like tropical forests
How will the urine concentration be affected if the henle''s loop of a person is removed and his PCT is joined directly with DCT?
An enhance in parasympathetic discharge to the heart leads to A. An enhance in the conductance of F-channels in SA node cells. B. An enhance in the conductance of potassium
what are structural adaptation of flatworm to it''s enviroment /
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Explain the Results of Coarctation of Aorta? Early hospital death in isolated coarctation is around 2 to 10 per cent. In many reports, mortality for older babies approaches 0.
Q. Why doesn't the food enter the trachea instead of going to the esophagus? When food is swallowed the swallow reflex is activated and the larynx closes and elevates to avoid
Q. In 1665 Robert Hooke, an English scientist, published his book Micrographia, in which he explained that pieces of cork viewed under the microscope presented small cavities simil
An episode of diarrhoea can be acute (recent origin) or chronic (extended duration and repeated episodes) in nature. You may recall reading in the Food Microbiology ans Safety Cour
In Drosophila, the anterior determinant Bicoid is known to activate expression of the gene hunchback in the anterior half of the embryo. (Bicoid is a transcription factor, which b
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