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Heredity has important role in ……….
a) intelligence             
b) moodiness and impulsiveness
c) shyness                   
d) all of these

d

Explanation Heredity refers to the genetic heritage passed down by our biological parents.



The cyclical and regular changes in behavioral characteristics is called…….
a) aestivation              
b) hibernation
c) biological clock     
d) biorhythms

d

 Explanation: These rhythms are a series of bodily functions regulated by your internal clock.



There are cyclic phenomena (biological rhythms) in biology which recurs each…
a) year            
b) each lunar month or each days
c) with the tides         
d) all of these

d

 Explanation: a number of biological characteristics of animals fluctuate in some regular fashion



Which of the following is/are may be involved in regulating biological rhythms or cyclic phenomena?
a) intrinsic biological clocks            
b) extrinsic biological clocks
c) circadian cycles      
d) both a and b

a

Explanation: Circadian rhythm is the 24-hour internal clock in our brain that regulates cycles of alertness and sleepiness by responding to light changes in our environment.



The organism of which zone of the world typically shows marked seasonal cycles of activity?
a) polar                                   
b) equatorial
c) tropic                                  
d) temperate

d

The biological phenomena in which organisms show a decrease in activity and metabolism during the winter is termed as………
a) aestivation              
b) hibernation
c) metamorphosis       
d) ecdysis

b

 Explanation also known as winter sleep e.g. polar bear and frogs



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