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What are melanocytes?
Melanocytes are epithelial cells of the skin particular in secretion of melanin. Melanin is a pigment that besides coloring the skin, the iris of the eye and the hair, also works as a filter against the ultraviolet radiation of the sun therefore protecting the body against the harmful effects of this radiation (mostly burns and carcinogenic mutations).
Define the Primary Stain and Mordant? (i) Primary Stain - Crystal violet is the primary or first stain, which stains all the cells violet/purple. (ii) Mordant - Gram's iodin
(a) What are the immediate effects of exercise on the functions of (i) the heart, (ii) the lungs, (iii) the liver? (b) How do these changes help to meet the needs of exercise
Define Abbe Condenser of Microscope? It is present beneath the stage, as shown in Figure. It collects and focuses a cone of light on the slide. Its position can be adjusted ver
In earthworms, when the ovaries mature, the clitellum secretes a viscous substance in the form of a girdle. This girdle hardens in to a cocoon around the clitellum. The ova are dis
Prophase This is the first and longest phase of mitosis .At its beginning all 10 nm segments of chromatids (= chromonemata) of the duplicated chromatin fibres of interph
Q. Explain about biological diversity? Biodiversity or biological diversity is a neologism and portmanteau word, from bio and diversity. It is the diversity of and in living na
Is nitrogen is important plant nutrients Nitrogen is an important plant nutrient which is assimilated by most of the plants as nitrate and ammonium ions. Organic matter is the
Explain single pan balance and Electronic Digital Balance? Single Pan Balance: This is a very sensitive balance used for weighing quantities less than 10 grams. It accurately w
Which type of plant tissue is cork? Cork, the material, for example, used to cap wine bottles, is extracted from the suber of a special oak known as cork oak.
what is the classificatin of phylum protozoa with orders
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