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Q. What is the association between sunrays and vitamin D?
Vitamin D or calciferol is synthesized in the skin by the action of the ultraviolet range of sunrays upon precursor molecules. Later it is transformed into its active form in the kidneys and the liver.
Explain the Advantage of Sponge Method? Advantage: The method is suitable when the surface to be swabbed is large or low incidence of microbes in the environment.
From your studies in ecology, you must be aware that most ecosystems are quite complex consisting of several habitats and that habitats in turn are composed of microhabitats. Each
Q. How dissimilar are the location of ribosomes in eukaryotic and in prokaryotic cells? In eukaryotic cells they can also be found free in cytoplasm and mainly adhered to the e
Porifera - Regeneration in Invertebrates Sponges have immense regenerating ability and show two ways of doing so as displayed below. : (a) Regeneration from small segments-
a) Mention the name of the causal organism, symptoms and the mode of transmission of the disease Amoebiasis b) Mention the property that enables the explants to restore into a n
Stratification - Aquatic ecosystems Aquatic ecosystems also exhibit marked stratification. In lake and ocean ecosystems light penetration, temperature and availability of oxyg
Why is complementary base pairing important in DNA structure? Complementary base pairing is important because the hydrogen bonds between the bases hold the two strands of DNA
What is the official name of pyruvic acid? Pyruvic acid is 2-oxopropanoic acid. It is thus a molecule made of three linearly bound carbons with one extremity forming the organi
Parthenogenesis The development of egg to form an animal without fertilization is called as parthnogenesis. Parthenogenesis was discovered by Charles Bonnet in the egg of se
Explain ozone shield? Name two gases that can cause damage to this shield. Give one harmful effect of this damage each on plants and animals.
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