The Fascinating World of Sponge Filter Feeding and Water Pumping

The video explores the efficiency of sponges as filter feeders, capable of capturing particles as small as bacteria. A demonstration using fluorescein dye shows how sponges pump water, highlighting their role as effective water pumps and strainers. Tube sponges are shown to pump dye vigorously, resembling smokestacks, while a large barrel sponge demonstrates its pumping ability by expelling dye like chimney smoke. The video concludes with a note of thanks.

What is the primary function of sponges as filter feeders?

• To create coral reefs

• To produce oxygen for marine life

• To provide shelter for fish

• To capture and eat particles as small as bacteria

What is used in the demonstration to show how sponges pump water?

• A colored dye

• A small fish

• A piece of coral

• A plastic tube

How do sponges prevent plankton from exiting through the osculum?

• By closing the osculum

• By using a chemical reaction

• By using a filter mechanism

• By trapping them with sticky cells

What visual effect do tube sponges create when pumping dye?

• They appear as a swirling vortex

• They resemble a bubbling fountain

• They mimic a gentle waterfall

• They look like a collection of miniature smokestacks

What is the result of the dye test on a large barrel sponge?

• The dye pours out like smoke from a chimney

• The dye changes color

• The dye remains stagnant

• The dye is absorbed completely

What cells are responsible for the sponge's pumping action?

• Collar cells

• Nerve cells

• Muscle cells

• Bone cells