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FORMATION OF SOIL
Evolution of Earth took place five to eight billion years ago when it was a red hot magma (molten rock). It took millions of years for the magma to cool down and during this process it got transformed in many ways. In the initial stages there was no water on Earth's surface, it rained for some million years and filled up valley like places to make oceans and sea s. In these early stages of evolution, Earth conditions were quite drastic in which formation of many silicates, like orthoclase, took place.
These in contact with water slowly hydrolysed to give open structured silicates called clay minerals. This transformation took another million years. Sometimes in between, life came into existence in water and evolved. This evolution was accompanied by the evolution of soil organisms which helped in the formation of soil
Define drug effects on Carbohydrate metabolism? Carbohydrate metabolism: Hypoglycemic drugs such as insulin and sulphonylureas are prescribed because of their ability to increa
body symmetry
Phases of Respiration in Animals The procedures of respiration in these animals have the following phases. i) External respiration is usually described as breathing. It inv
The Phenomenon of acid rain was first introduced by Rober Angus smith in 1852. Is means presence of excessive acids in rain water? Acid rain is a form of precipitation (rain, sn
Explain the Cardiovascular Effects? You must have heard of the 'French Paradox'. The lower incidence of heart attacks in certain areas of France despite higher prevalence of fa
Part of the endocrine system in humans, these 2 glands are small bodies located at upper end of every kidney. While these glands perform a range of functions, two of the most signi
What happens when the oxygen supply is insufficient to maintain aerobic cellular respiration during muscle exercise? If oxygen from hemoglobin or myoglobin is not enough for th
Q. Selection of foods for diabetic patients? Some handy guidelines for selection of foods for diabetic patients is presented next. You may be aware that some foods need to be
Q. What do you mean by Borrowed Materials? For the study of as much relevant material as possible the material is obtained on loan. Borrowed specimens benefit the' lending inst
1. (a) Which physicochemical properties need to be regulated by the cell? Define chemical equilibrium and discuss how it is maintained by the cell. (b) Differentiate between facili
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