Sponges

What type of symmetry do sponges (Porifera) have?

• asymmetrical
• radial
• bilateral 
• medial

The elastic fibrous protein found in sponges is called .....

• mesohyl
• spicules
• spongin
• tissue

They outer layer of a sponge is made of flattened cells called ______

• porocytes
• pinacocytes
• choanocytes
• amoebocytes

The spongin and spicules make up what in sponges?

• digestive tract
• skin
• stomach
• skeleton

Choanocytes are also known as _____.

• epithelial cells
• amoeboid cells
• collar cells
• pore cells

Water enters sponges through the ______.

• ostia/ostium
• oscula/osculum

Which cells in sponges are responsible for nutrient transport and transporting a sperm to an egg?

• porocytes
• pinacocytes
• choanocytes
• amoebocytes

Cells with flagella that line the interior of a sponge are __

• spongin
• cnidocytes
• choanocytes
• sessile

Describes an animal that does not move as an adult

• hermaphrodite
• sessile
• filter feeder
• spongin

Supportive structure in a sponge that keeps the sponge from collapsing

• choanocytes
• spongin
• nerve net
• polyp