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At which stage shown below does the frog use both skin and lungs for gas exchange

A) egg
B) tadpole
C) tadpole with legs
D) adult frog

At which stage shown below does the frog use both skin and lungs for gas exchange-example-1
User Takermania
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1 Answer

3 votes
i think it an adult frog
User Rahul Mandaliya
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