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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.
What is nucleus where it is found? Nucleus : The nucleus is present only in eukaryotic cells. It is the control center and is generally found in the center of the cell. The
Percent solutions are made on the basis of g/ml or ml/ml of diluent, and it is usually assumed that 1 ml of water = 1 g of water. For example, 20 g/100 ml of water or 200 g/1000 ml
Q. What do you understand by global warming? The Global warming is the increase in the temperature of the planet due to accumulation of some gases in the atmosphere, especially
INTERMEDI A T E FILAMENTS These are non-living structures. Made up of different types of protein eg. Keratin, synemin, desmin and vimentin. These are divided into four
Metamerism oe Segmentation In the early coelomates the coelom was not divided into segments, the whole body cavity was a single space. Hence body movements were not precise.
What is mass transportation across the cell membrane? Mass transportation is the entrance or the exiting of substances in or from the cell engulfed by portions of membrane. The
Q. How does the plant cell wall act in response when it is placed under hypotonic medium? The plant cell wall (the covering of the cell external to the cell membrane) is made o
what are the physiological adaptation shown my prey as defence
Is monoculture a system that contributes to great biological diversity of an ecosystem? Monoculture means that in a large area a single crop (only single species of plant) is c
would i be able to get help on these case study questions
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