Define: calcareous shell;non-cleidoic egg

CBSE Class 9
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Define: calcareous shell;non-cleidoic egg

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  1. Calcareous Shell: It is shell mainly composed of calcium carbonate.
  2. Non-cleidoic Egg: Non-cleidoic eggs are laid in water, not protected by shells and without sufficient nutritive material for the complete development of the embryo. Generally, a non-cleidoic egg hatches into a larva.