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THEORIES OF AGEING -
1. Compromise theory.
2. Wear & tear theory.
3. Somatic mutation theory.
4. Immunity theory - Thymus becomes less active
5. If matabolic rate is high, die sooner.
Gerentology deals with age of animal.
How can an adult lose billions of cells from all parts of the body each day and still survive?
Q What is the radula? What is the function of this organ? Some molluscs have a tongue-like structure with harsh saliences similar to small teeth. This structure is called as ra
Why does scientist think that RNA was the first genetic material?
A few individuals from a herd of deer are forced to migrate to a new herd. This is an example of resulting in. a. Gene flow; enhance in similarities between populations.
What are the hyphae and the mycelium of pluricellular fungi? The major structures of pluricellular fungi are the hyphae (threadlike filaments made of contiguous uni or multinuc
To prevent and control Staphylococcal food poisoning: • Avoid contamination of foods • Kill organism by heating, refrigeration • Personnel hygiene • Adequate cookin
Polyphyletic Theory - Metazoa This theory was suggested by Greenheig (1959) and some other workers. According to this theory, sponges, coelenterates, ctenophores and flatworms
Q. What are the main risk factors for hypertension? The major risks factors for hypertension are tobacco smoking, stress, obesity, sedentary lifestyle and alcoholism.
Q. Can Diseases be etiological factor for diabetes? Diseases: In aging, a very important cause of diabetes could be an underlying disease. Diabetes occurs secondary lo some ot
Cell wall is the structure produced by some of the cells outside their cell membrane; variously composed of the chitin, peptidoglycan, or cellulose.
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