theories of ageing -1
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.
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regeneration -natural ability of living being to replace worn out parts to repair damaged parts to regrow cost off organs amp to reform entire body
types of regeneration -reparativerestorative1 it is limited to healing of wounds or replacement of cellsit can replace the lost part of body or
mechanism of regeneration -th morgan recognised 2 primary mechanisms -morpholaxisepim orphosis1 production of entire animal from a small fragmentit
ageing -the appearance of some changes as the body grows older is called ageing it ultinately leads to deathit can be defined as deteoration in
theories of ageing -1 compromise theory2 wear amp tear theory3 somatic mutation
death -it is terminal end of the degeneration changes of old agedeath occurs when vescular system amp respiratory system stop workingfailure of
economic importance of wild life - i plants -produce foodprovide timber paper gums drugs pigments fibres rubber oils condiments amp fuelrelease
why conserve wild life 1 economic importance of wild life - i plants -ii animals -iii micro organisms
extinction -it refers to disappearance of a species from earth when its last surviving member diesorganic evolution not only creats new sps but
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