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2.Human Reproduction
normal
Tertiary egg membranes are lacking in mammals with the exception of the
A
Euetherians
B
Metatherians
C
Prototherians
D
None of the above
Solution
(c)Tertiary egg membrane are lacking in mammals with the exception of prototherian. It is secreted by the oviduct or accessory female reproductive organ.
Standard 12
Biology