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What is Lifespan ?

Each and Every organisms can live only for a certain period of time. The period from birth to the natural death of an organism represent its lifespan.

Lifespans of organismd are not necessarily co-related with their sizes. (For e.g :- the size of crow and parrot are not very different yet their lifespan shows a wide difference).

Whatever be the the lifespan , death of an every organism is a certainty , i.e, no individual is immortal except single - celled organisms .

Lifespans of various organisms :-

Elephant - 60 to 90 years

Dog - 20 to 30 years

Butterfly - 1 to 2 weeks
Crow - 15 years
Parrot - 140 years
Cow - 20 to 25 years
Horse - 60 years
Crocodile - 60 years
Fruit fly - 1 month 
Tortoise - 100 to 150 years 
Rose - 5 to 7 years 
Banana Tree - 25 years 
Rice Plant - 3 to 4 months 
Banyan Tree - 200 to 300 years

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