Is fecundation in mammals external or internal
Is fecundation in mammals external or internal?
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Fecundation in mammals is inner, with copulation. In contemporary world human technology is capable to encourage artificial external fecundation of human gametes and of gametes of further animals.
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Whether fecundation in amphibians is external or internal? Also explain whether amphibians are evolutionarily proximal to fishes or to reptiles?
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