Question

Cleidoic egg is found in
(A) Birds
(B) Reptiles
(C) Insects
(D) Both A and B

Answer 1

Hint: The eggs are the spherical shaped ones that contain the embryo of the offsprings. This is laid by the female organisms only. The eggs of the birds and the reptiles contains the thin shell for the protection of the yolk inside. On the basis of the shell present in the eggs, is classified into cleidoic egg and the non- cleidoic eggs.

Complete answer:
In the cleidoic eggs, the shell is thick and hard in nature. But this shell allows the movement of gases and hence they are permeable for the gases. In cleidoic eggs, the yolk, water and the salts are present inside the eggs in the large amounts. This helps in the growth of the embryo in the egg before the process of hatchling.

It is a terrestrial adaptation. The cleidoic eggs occur in birds, reptiles, prototheria mammals etc. These eggs are either flexible or hard in nature. The main significance among the cleidoic eggs are they can be obtained from the reproduction out of water. Hence both the birds and the reptiles lay the eggs which are cleidoic in nature.

Hence the correct answer is OPTION(D)

Note: These cleidoic eggs are also called as the private little pond since this egg offers the water and the nutrition for the growth and the development of the embryo before the process of hatchling. These are mainly found in the home thermal and the poikilothermic organisms.