Question

Cleidoic eggs are characteristic of

• A. Mammals
• B. Reptiles, birds and insects
• C. Insects only
• D. Fishes

Answer 1

The correct option is B Reptiles, birds and insects

• Cleidoic eggs are those eggs, which have a protective shell, and are laid out of water.
• The shell is porous to air, and maybe flexible or calcareous (hard). The eggs contain all the food the embryo needs to develop into a hatchling.
• The significance of the cleidoic egg is that it enables reproduction out of, and often away from, water.
• The eggs of insects and birds, which is enclosed in a protective shell limiting the exchange of water, gases, etc. These types of eggs are found in reptiles, birds, and insects. Hence, option B is correct.