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Many animals use the diurnal and seasonal variators in light intensity and photoperiod to time their 
  • a)
    migration 
  • b)
    reproductive activities
  • c)
    suspension 
  • d)
    all of these
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
Many animals use the diurnal and seasonal variators in light intensity...
Animals use seasonal variations in light intensity and photoperiod to time various activities. Birds of colder areas of northern hemisphere begin their southward migration as the day lengths begin to shorten. Reverse journey is undertaken with the increase in day length. Turkeys, ferrets and starlings breed in response to lengthening of days while goat, sheep and deer breed in response to shortening of days. Rabbits and guinea pigs are day neutral. In temperate and subtropical areas, cold blooded or ectothermic animals undertake hibernation as the day length begins to shorten.
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Many animals use the diurnal and seasonal variators in light intensity and photoperiod to time theira)migrationb)reproductive activitiesc)suspensiond)all of theseCorrect answer is option 'D'. Can you explain this answer?
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