Questions: Protostomes undergo [ Select ] cleavage and Deuterostomes undergo [Select] cleavage during development of the embryo.

Protostomes undergo spiral cleavage and Deuterostomes undergo radial cleavage during the development of the embryo.

Explanation:

• Protostomes, which include groups like mollusks, annelids, and arthropods, typically exhibit spiral cleavage. This type of cleavage is characterized by the cells dividing in a spiral pattern, where the cells are not aligned directly above one another.
• Deuterostomes, which include groups like echinoderms and chordates, exhibit radial cleavage. In this type of cleavage, the cells divide parallel or perpendicular to the axis of the embryo, resulting in cells that are aligned directly above one another.

In summary, the correct terms to fill in the blanks are "spiral" for Protostomes and "radial" for Deuterostomes.