Wednesday, 16 October, 2019

Category: BOTANY


Cell division                      Virchow (1885) pointed out that new cells are always formed through the division of pre–existing cells and investigated the process of cell division.        Cell cycle : The sequence of Read more…


Monera (Prokaryotes)   Characteristics of monera Monera (Monos – single) includes prokaryotes and shows the following characters : (1) They are typically unicellular organisms (but one group is mycelial). (2) The genetic material is naked circular DNA, not enclose by Read more…


Systematics Taxonomy Biology is an important branch of science dealing with the study of life. It is difficult to define life. But it is easy to discriminate living things from non-living things. On this basis life is defined as a Read more…


APPLICATION OF BIOLOGY ECONOMIC BOTANY (1) Cereals : These are the members of family Gramineae and grown for their edible seeds. They are characterised by the presence of caryopsis a type of fruit in which seed wall becomes fused with Read more…


  Human Population Introduction. The first clear warning of the dangers of human overpopulation was given by Thomas Malthus (1766-1834). Malthus in his article “Essay on the Principle of Population” (1798) pointed out that population tends to increase in geometric Read more…


  Application of Botany-Economic Botany         Cereals These are the members of family Gramineae and grown for their edible seeds. They are characterised by the presence of caryopsis a type of fruit in which seed wall becomes Read more…


Ecology and Environment          Definition : Ecology deals with the various principles, which govern the relationships between organisms and their environment. Reiter first used the term ecology in 1868. Ernst Haeclel (1886) first correctly defined ecology as “the science Read more…


Growth, Growth Hormones and Movements        Definition : Growth may be simply defined as “a synthesis of protoplasm, usually accompanied by change in form and an increase in the mass of the growing system. Growth is defined as an irreversible Read more…


Enzymes Introduction The first indication of the occurrence of enzymes in living systems was given by Kirchhoff (1815). The term ‘enzyme’ was coined by Kuhne (1878) (Gr. en : in, zyme : yeast). Louis Pasteur believed that fermentation was brought Read more…


  Photosynthesis And Respiration In Plants Introduction : All life processes require energy. Much of the food obtained by autotrophic and heterotrophic nutrition is used as a source of The energy rich compound are broken down to release energy by Read more…

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