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2.Human Reproduction
normal
In the egg of bird, shell and shell membranes are
A
Permeable to ${O_2}$ and $C{O_2}$
B
Permeable to water only
C
Permeable to air only
D
Non-permeable
Solution
(a)The calcareous shell present around the eggs of birds in porous and allows diffusion of oxygen ($O_2$) and carbon dioxide ($CO_2$).
Standard 12
Biology
