LIFE SPAN IN ORGANISM

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LIFE SPAN IN ORGANISM

  1. CLASS – 12TH BIOLOGY
  2. UNIT – 1ST REPRODUCTION
  3. CHAPTER- 01 REPRODUCTION IN ORGANISM
  4. TOPIC – LIFE SPAN ( जीवन अवधि )

LIFE SPAN

  • THE PERIOD FROM BIRTH TO THE NATURAL DEATH OF AN ORGANISM CALLED LIFE SPAN .
  • EACH ORGANISM HAS A SPECIFIC AVERAGE LIFE SPAN.
  • IT MEANS EACH ORGANISM GROW AND LIVES FOR A PARTICULER LENGTH OF TIME .
  • LIFE SPAN MAY RANGE FROM ONE DAY TO 4000 YEARS.
  • PLANTS GENERALLY HAVE GREATER LIFE SPAN COMPARED TO ANIMAL .
  • CAN YOU GIVE ANSWER WHY ?
  • ANSWER – BECAUSE THE PLANTS CONTINUE TO GROW AT THERE TIPS EVEN WHEN A LARGE PART OF THERE CONSIST OF DEAD CELLS
  • THERE IS GREAT VERIATION IN THE LIFE SPAN OF LIVING ORGANISM.
  • GENERALLY BELIEVED THAT THE LIFE SPAN OF LARGE ANIMAL IS GREATER THAN SMALL ANIMAL.
  • IT IS NOT TRUE – NO CORELATION BETWEEN LIFE SPAN AND THERE SIZE.
    EX. ELEPHENT -70 YEAR , HIPPOPOTAMUS -50 YEARS, HORSE – 45 YEARS, GORRILLA -25 YEARS

STAGES OF LIFE SPAN-

  • THERE ARE FOUR STAGES IN THE LIFE SPAN
    JUVENILITY – THIS REPRESENTS THE STAGE BEFORE THE ORGANISM DEVELOPS THE CAPACITY TO REPRODUCE. IT MEANS IT IS THE PERIOD PRIOR TO REPRODUCTIVE STAGE.
    MAURITY- IN THIS STAGE REPRODUCTION START.
    AGEING – PROGRESSIVE DETERIORATION IN BODY OF AN ORGANISM
    DEATH- IT MEANS THE ALL VITAL ACTIVITIES ARE ENDED.

AVERAGE LIFE SPAN OF SOME LIVING BEINGS-

  • MAY FLY – 1 DAY
  • GORILLA -25 YEARS,
  • HORSE – 45 YEARS,
  • SILK MOTH- 1-3 DAYS
  • RHINOCEROS -50 YEARS
  • HIPPOPOTAMUS- 50 YEARS
  • RICE -4 MONTHS
  • INDIAN ELEPHANT – 70 YEARS
  • OWL- 70 YEARS
  • WHEAT- MONTHS
  • MAN- 70 YEARS (100years )
  • PARROT – 140 YEARS
  • SHREW – 1 YEAR
  • TORTOISE- 300 YEARS
  • BANYAN- 200 YEARS
  • HOUSE MOUSE- 2 YEARS
  • OAK – 500 YEARS
  • PEEPAL – 2000 YEARS
  • CHIPMUNK -5 YEARS
  • SEQUOIA- 3000 YEARS
  • RABBIT- 13 YEARS
  • DOG AND CAT -15 YEARS ( 20-30 years)
  • BLACK BEAR-25 YEARS

WHAT YOU LEARNT ?

WHAT IS LIFE SPAN ?
STAGES OF LIFE SPAN.
EXAMPLE OF AVERAGE LIFE SPAN OF SOME LIVING BEINGS
FIND OUT THE LIFE SPAN OF SOME ORGANISM.

ATTEMPT QUIZ

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