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Soil is upper crust of earth which support land plants and animals. It is defined as addition of substances to the soil, which adversely affect physical, chemical?
And biological properties of soil and reduces its productivity. Soil formation process is very slow which makes soil pollution very severe.
Example: Excessive use of fertilizer, pesticides, leaching of chemicals, soil erosion etc.
What are the grasslands of North America and of South America respectively called? The steppe grasslands of North America are known as prairies. The grasslands of South America
Chemical Methods of Estimating Available Nutrients Water soluble forms of nutrients are available to plants but forms other than water soluble may also become available to pla
Historically how has the origin of life on earth been explained? The mainly recurrent explanation for the phenomenon of life on earth is the mythological. The People from vario
The Intine Layer As soon as the tetrads release the microspores, the inner layer of the pollen wall (intine) is formed. Proteinaceous lamellae are embedded in the matrix of th
define and explain Water vascular system with podia and tube-feet madreporite mostly present
Water Water usually forms about 50% to90% part of living protoplasm. Life upon earth originated in the ocean and the conditions of that aqueous primeval environment have been r
LETHAL GENE (2:1 Instead of 1 : 2 : 1 or 3 : 1) (i) All the genes present in an organism are not useful, but some of them show harmful effects and sometimes may cause d
Even though association between GAS pharyngitis and the ARF is fairly well established, the exact pathogenic mechanisms are not clearly understood. However, two mechanisms are post
a) Where casparian strips situated in a plant body are and what are they made up of? Mention its function. b) What is respiration quotient (RQ)? Under what conditions will th
Discuss about the Halstead Reitan battery The Halstead Reitan battery continues to be widely used as a clinical and research procedure. Numerous investigators use it in their r
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