Phylum - Porifera MCQ Question with Answer

Leucon type of Canal System
Further folding of the body wall leads to the formation of a more complex type of canal system known as the Leucon type of canal system. In this type, Incurrent Canals open into Flagellated Chambers through the Prosopyles. There is no Spongocoel, and instead the Excurrent Canals are present. The Flagellated Chambers open into the Excurrent Canals through the Apopyles. The Excurrent Canals open to the outside via the Osculum. Sponges having Leucon type of canal system are called as Leuconoid sponges, for example, Plakina, Geodia, Spongilla, Oscarella, etc.