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Soil-Environmental Components
The word soil is derived from Latin word 'solum' meaning earthy material in which plants grow. The soil is the consolidated outer layer of the earth's crust ranging in thickness from a mere film to three metres or more. It provides mechanical anchorage to plants, besides being a reservoir of water and plant nutrients. The soil also supports a rich and highly diversified micro-flora and fauna.
Typically, soil is a complex mixture of inorganic and organic materials. The inorganic materials, that is, the mineral constituents of soil are derived from parent material (the soil forming rocks) by fragmentation and weathering. The pore spaces formed between the mineral particles of soil are filled with water and gases. The organic components of soil comprise organic wastes, dead remains of plants and animals, and their decomposition products. Besides, a large variety of algae, bacteria, fungi and many small and large animals are invariably present in a fertile soil.
Procaryotic Structure and Diversity The first organisms which did not have well defined nucleus, called procaryotes, (pro = earlier, caryon = nucleus) were probably anaerobic a
Contractile vacuole - Protozoans The contractile vacuoles may differ in complexity in various groups of protozoans. In amoebae the vacuoles are carried around in the cytoplasm
Assessment The child with dysentery will present you with sudden onset of fever, prostration, vomiting, bloody diarrhoea, abdominal pain and tenesmus. Patient may suffer from
the function of contractil vacuole
How does the Cornea work, I heard that it is like a motor, however i''m not too sure... because a motor is in vehicle and has piston, and the Cornea is in our eyes and... Well does
discuss why obelia is considered to be of special interest in zoology as an animal showing an intermediate grade of organisation
PR E FORMATION THEORY - Proposed by Marcello Malpighi. Studied chick egg and proposed his work in "De ova-incubato". According this different part of embryo previousl
55yrs old woman had burns and has lost 6% body fluid.She weighs 50Kg.How much fluid does she need to replace the lost fluid.
Q. What are the four groups of protozoans? The four main groups of protozoans are the mastigophores flagellated, like the trypanosome that causes Chagas' disease, the sarcodine
Explain for Procedure Quantitative Determination of Viable Microbes? Now carry out the exercise following the steps included herewith: 1. Label the diluent tubes from 10 -1
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