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Reproduction in organisms — BIOLOGY STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceBIOLOGYReproduction in organisms1 Mark
MCQ
In the egg of bird, shell and shell membranes are:
  • ✓
    Permeable to $O_2$​ and $CO_2​$
  • B
    Permeable to water only
  • C
    Permeable to air only
  • D
    Non $-$ permeable
✓

Answer

Correct option: A.
Permeable to $O_2$​ and $CO_2​$
Reptiles and birds and some insects have developed eggs with a shell impermeable to water.
These shells allow oxygen to diffuse into the egg and carbon dioxide to diffuse out.
Such eggs which does not allow the transport except for gas exchange are called as cleidoic eggs.

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