ANATOMY

Detailed explanation-1: -Insects use a different type of meroblastic cleavage. The yolk of the eggs of insects is concentrated in the center of the egg. The daughter nuclei produced by mitosis of the zygote nucleus remain suspended within the single egg compartment.

Detailed explanation-2: -Centrolecithal arthropods exhibit superficial cleavage (including insects). Therefore, the correct answer is an option (D) i.e, Insects. Note: A meroblastic cleavage in which mitosis takes place without cytokinesis, resulting in a large number of nuclei migrating to the centrolecithal egg’s periphery.

Detailed explanation-3: -Definition noun (embryology) A meroblastic cleavage wherein mitosis occurs without cytokinesis, resulting in many nuclei, which migrate to the periphery of a centrolecithal egg.

Detailed explanation-4: -Superficial cleavage occurs in arthropods that have centrolecithal egg cells (egg cells with the yolk located in the center of the cell). This type of cleavage can work to promote synchronicity in developmental timing, such as in Drosophila.

Detailed explanation-5: -(b) Superficial cleavage-In centrolecithal eggs, the cleavage is restricted to the peripheral cytoplasm of the egg. Eg: insects.