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Q. Phylogenetic systems of classification?
As already pointed out 'earlier that in Phylogenetic system, the plants are classified according to their evolutionary relationships. It is very difficult to claim that a phylogenetic system is perfect on the basis of evolutionary affinities due to incomplete fossils records and in such a situation the plants are classified on the basis of available data. The systems of classification by Engler and Prantl (1887-1915), Hutchinson (1926, 1934, 1969 and 1973) and by Takhtajan (1954, 1964, 1973, 1980) are Phylogenetic systems. We shall discuss these systems one by one in details.
Q. What is the nitrogen cycle? The nitrogen cycle represents the recycling and circulation of the chemical element nitrogen in nature. The nitrogen cycle fundamentally depends
Abscisic Acid (AbA) - Plant Growth Substances In 1961 Lice and Cams isolated a substance in crystalline form from mature cotton fruit. This substance stimulated the abscission
examples of pisces
C o mbination of meat products Combining meats and byproducts of different species to produce value added products results in complementation and supplementation of their qua
Thalassemia Thalassemias are the commonest hemolytic anaemias or disorder seen in children in India. This is characterised by deficiency in the synthesis of one of the norm
Endocrine glands
What is Fluorescent Microscope? In above said microscopes, image is produced from light that passes through a specimen. In fluorescent microscope, however, specimen image is f
Dominance - Synthetic Characters It is a characteristic of vegetation which expresses the predominating influences of one or more species in a stand so that the population of
Define Foam Spray Drying Method? This is an extension of spray drying and involves the use of gases dissolved under pressure prior to spraying. The main advantage is that the
what is Acute Massive Pulmonary Embolism ? Acute Massive Pulmonary Embolism : Before the era of open-heart surgery, Trendelenburg (1908) described technique of open p
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