Question

question # 15 1 points sponge collar cells used to keep water flowing

Explanation:

Collar cells in sponges, also known as choanocytes, have flagella that beat to create water - flow through the sponge for functions like feeding and gas exchange.

Answer:

True (assuming the question is asking if the statement is true or false. If it's a fill - in - the - blank, the key function related to water - flow is filtration and creating current which is done by the beating of flagella on collar cells)