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Inorganic Substances - Abiotic Components
There are about forty elements that are required in various processes of living organisms. Some of these are macronutrients which the plants need in relatively large amounts, and others are micronutrients that are required in trace amounts. There are nine macronutrients: carbon, hydrogen and oxygen (the three elements found in all organic compounds), and nitrogen, potassium, calcium, phosphorus, magnesium, and sulphur. Some examples of micronutrients are: iron, chlorine, copper, manganese, zinc, molybdenum and boron.
Q. How are gametes formed in the pteridophyte life cycle, by mitosis or meiosis? What is the type of meiosis that occurs in pteridophytes? In pteridophytes gametes are made by
(a) Give two examples of diseases which can be spread by contaminated drinking water. (b) How can the spread of such diseases be prevented? (a) Typhoid and cho
Blockage of ducts In some bulls there is a blockage of the transport of sperm through the epidydimis usually caused by a congenital non-patency of some part of the vasa effere
Mas s Extinction - Since beginning many species evolved and got extinct (in fact only 1 % is living). Sometimes it occured suddenly at large scale, (most recently dinosa
Lactate dehydrogenase (LDH) is one of the important enzymes in glycolysis which catalyzes the interconversion of pyruvate and lactate as follows: Functional lactate d
Natural Classification Natural classification is based on the natural characters of the taxa. Some consider natural classification a phylogenetic one reflecting the evolutionar
Herbicide tolerant crops (HTC) Increased use of the herbicides plant is tolerant to (describes ecological impact eg toxic residues in soil, runoff into waterways) Ther
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CAR E OF EYES - 1. Eyes should be periodically examined in children. 2. While reading the paper should be held 36 cm. away from eyes and preferable at an angle
Canine distemper Canine distemper, a highly contagious disease of dogs, is caused primarily by air- borne virus which belongs to the genus Morbillivirus in family Paramyxoviri
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