Question

The choanocytes lining the spongocoel are embryologically

• A. Endodermal in origin
• B. Ectodermal in origin
• C. Mesodermal in origin
• D. Cuticular in origin

Answer 1

The correct option is A Endodermal in origin

Choanocytes also known as 'collar cells' are distinctive cells that line the interior body walls of sponges. These cells have a central flagellum that is surrounded by a collar of microvilli. It is endodermal in origin as they are formed by the germ layer known as endoderm and lines the inner wall of spongocoel.

So, the correct answer is option A.