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In what way do chlorofluorocarbons (CFCs) cause global problems?
Chlorofluorocarbons react with and deplete the ozone in the ozone layer. This permits more ultra-violet light from the sun to reach the Earth, with harmful effects on living organisms (e.g. skin cancer in humans).
Vein Grafts : At the end of ten years only 50 per cent of saphenous vein grafts are paten1 and 50 per cent of the rest may have significant atherosclerotic changes. In a
Forms of Soil Water Gravitational Water or Ground Water: After a heavy rain or irrigation, much of the water drains or sinks downwards. This is called gravitational water.
Features of Plant and Animal Cell However plant and animal cells also differ. One of the most prominent features of the plant cell is its huge vacuoles filled with cell sap.
Etiology Fevers can be caused due to 1. Internal (endogenous) factors: This could be caused within the body. Examples are antigen-antibody reactions, malignant cancer, graf
Explain about the Picric acid test? This test is answered by all reducing sugars, with a free aldehyde or ketone groups. Monosaccharides possess a free aldehyde or ketone group
Describe how many bones are there in human foot The human foot is a great mechanical marvel. It has 26 bones, 29 joints, and 42, various ligaments, a sensitive and protective s
Floral Induction The transformation of vegetative apex into a floral apex is a multifactor and multistep phenomenon. Despite researches on flowering carried out during the las
Method for fractionation of subcellular organelles In order to study the composition and the metabolic role of the various subcellular organelles in a cell, it becomes necessar
In certain instances differences in the morphology of genitalia between species make it impossible for normal mating to occur, and sympatric species tend to remain isolated. When t
Q. What is the crystallization of a virus? What is the significance of this process? Crystallization is the procedure of transformation of viral components into organized solid
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