ANATOMY

Detailed explanation-1: -The cleaved cells may be unequal in size. 3. Equatorial plane: This cleavage plane bisects the egg at right angles to the main axis. It lies on the equatorial plane.

Detailed explanation-2: -(1) Meridional plane : When cleavage furrow bisects both the poles of the egg, passing through the animal vegetal axis, the plane of cleavage is called meridional plane.

Detailed explanation-3: -cleavage, in embryology, the first few cellular divisions of a zygote (fertilized egg). Initially, the zygote splits along a longitudinal plane. The second division is also longitudinal, but at 90 degrees to the plane of the first. The third division is perpendicular to the first two and is equatorial in position.

Detailed explanation-4: -The cleavage can be either holoblastic (complete) or meroblastic (incomplete cleavage), depending on the amount of yolk in the egg. Similar to echinoderms, cleavage in frog embryos is generally radially symmetrical and holoblastic. The frog egg is mesolecithal in nature and has a lot of yolk.

Detailed explanation-5: -Determinate. Indeterminate. Holoblastic. Meroblastic.