Zoology Semester Exam

Front

What is the most complex body plan of sponges?

Back

Leuconoid sponges have the most complex body plan and the greatest surface area.

Front

What structure is responsible for anchoring a sponge?

Back

The holdfast is the structure that anchors a sponge down.

Front

Can sponges live at great ocean depths?

Back

True, sponges can live up to 5.5 miles deep in the ocean.

Front

Do sponges have the ability to sense environmental changes?

Back

True, sponges can sense light, chemicals, flow rate, and temperature.

Front

Which type of sponge is restricted to shallow marine waters?

Back

Calcarea sponges can only live in shallow marine waters.

Front

What are spicules in sponges?

Back

Spicules are structural elements found in sponges that provide support and deter predators.

Front

What is the primary function of ostia in sponges?

Back

Ostia are small openings in sponges that allow water to enter the body for feeding and respiration.

Front

What is spongin?

Back

Spongin is a fibrous protein that makes up the skeleton of some sponges.

Front

What is the significance of the sponge's body plan?

Back

The body plan of a sponge affects its efficiency in filtering water and obtaining nutrients.

Front

What role do choanocytes play in sponges?

Back

Choanocytes are specialized cells in sponges that help in water circulation and food capture.