The greatest evolutionary change enabling the land vertebrates to be c – McqOptions

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1.	The greatest evolutionary change enabling the land vertebrates to be completely free from water, was the development of [CPMT 1972, 79; CMC Vellore 1993; MP PMT 1996]
A.	Four legs
B.	Lungs
C.	Shelled eggs and internal fertilization
D.	Four chambered heart
Answer» D. Four chambered heart

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