Question Detail
Question
In origin, the choanocytes, the flagellated cell present in the radial canal of Sponges, are
Correct Answer
Option A is the correct answer.
Detailed Explanation
Choanocytes (collar cells) in sponges are derived from ectodermal (outer) layer during development. They are flagellated cells that create water currents and capture food particles. Although they line the spongocoel and canals, which appear interior, their embryonic origin is ectodermal, as sponges lack true endoderm.
Hint
Consider the embryonic germ layer origin of these specialized feeding cells in sponges.