Which statement about cleavage patterns is true?
A) In radial cleavage, mitotic spindles of successive cell divisions form parallel or perpendicular to the animal-vegetal axis of the zygote.
B) Spiral cleavage is found in animals with incomplete cleavage.
C) Radial cleavage is found in animals with incomplete cleavage.
D) Frogs display spiral cleavage.
E) Snails display radial cleavage.

Question

Quizplus · Accepted Answer

In radial cleavage, mitotic spindles of successive cell divisions form parallel or perpendicular to the animal-vegetal axis of the zygote. Spiral cleavage, on the other hand, is found in animals with complete cleavage, and frogs do not display spiral cleavage. Snails do display radial cleavage.

Which Statement About Cleavage Patterns Is True