Answers

2016-01-23T18:02:41+05:30
Yes, the gills develop into lungs.
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2016-01-23T18:05:55+05:30
Yes, lungs can be formed from gills. A zygote when starts developing, it also have gills and is in the form of a fish. Also, the uterus is filled with some fluid for the surviving of that stage of zygote.
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