Explain evolutionary relationship among animal groups, Biology

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Evolutionary relationship among various animal groups is depicted in the cladogram given below. P, Q and R respectively shown:

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a.  Vertebrae, hair and four limbs.

b.  Bony skeleton, hair and amniotic eggs.

c.  Vertebrae, amniotic eggs and hair.

d.   Respiration by skin, lungs and poikilothermy.

 

 


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