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GROWTH AT DIFFERENT LEVELS -
1. Molecular level - It involves synthesis of new molecules and their aggregation into organellae.
2. Cellular level - It includes -
(i) Expansion or hypertrophy - Increases in the size of cell due to addition of protoplasm.
(ii) Cell division (Hyper plasin) - Increase in the number of cells.
(iii) Cell differentiation - formation of tissue and organs.
(iv) Matrix formation - addition of apoplasmatic substance as matrix of connective tissue, inercellular fluid.
3. Individual level - Visible increase in body dimension.
Criteria of Essentiality Amon and Stout as early as 1939, suggested certain criteria that an element must fulfil in order to be classified as essential. These criteria are lis
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Cell - Cell is the structural & functional unit of life. Study of the structure of the cell is called cytology. Study of structure and functions of the cell is called
A field trip to observe flowers:- Plan a field trip to view flowers in bloom. If no interesting wildflowers can be found growing near the school, the trip can be planned to a p
Q. What are the main human degenerative diseases? The major human degenerative diseases are divided into three groups, neoplastic diseases and degenerative diseases of the nerv
classification of protozoa
What is cell cycle? Cell cycle, or mitotic cycle, is the time period that starts when the cell is formed and finishes when it is divided by mitosis making two daughter cells. T
Disease occurrence due to climate change The movement of animal diseases across physical and political boundaries threatens food security and creates a global public co
Explain about the Zinc Toxicity? Only a few occurrences of acute zinc poisoning have been reported. The toxicity signs are nausea, vomiting, diarrhoea, fever and lethargy and h
Linolenic Acids Fats in this group contain substantial amounts of linolenic acid (C18 triunsaturated). Examples are soybean, mustard, rapeseed, flaxseed and wheat germ hemps
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