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Q. How are artificial and natural pearls created?
Pearls are made from small strange particles that deposit between the mantle and the shell of the oyster. These particles trigger a defense process by the organism and they are gradually covered by calcium carbonate layers secreted by the oyster thus giving birth to pearls.
In the artificial production of pearls a small fragment of shell covered with mantle pieces is inserted between the mantle and the shell of an oyster and a pearl is formed around the graft.
Oligosaccharides Compounds containing 2 to 6 monosaccharides units joined by a glycosidic linkage.
The intermediates in the cycle give precursors for various biosynthetic pathways. An instance is as given below: - From citrate synthesis of fatty acids; - Amino acid synth
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What is the relationship between the following scientific terms: hypothesis, a theory, and a natural law?
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give an account of specific characters of phylum porifera
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Assume that your yard has many tall trees that result in about fifty percent of the yard being shaded and fifty percent of the yard being exposed to full sun. The shaded areas and
Ed e m a It refers to excessive accumulation of fluid in tissue spaces caused by disturbance in the fluid interchange between capillaries, tissue spaces and lymphatic vessel
Suppose many of the atoms of nitrogen in a double-stranded molecule of DNA, of isotope N-14, were replaced with the isotope N-15. What afffect would this have? a) The nitrogeneo
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