Porifera and Cnidarians

Name of D (opening at top)

• Osculum

• Ostia

• Choanocytes

• Incurrent Pore

Flagella inside a sponge keep water moving through its body. Why is this necessary?

• It prevents the sponge from floating away

• It allows the sponge to feed

• It allows the sponge to absorb carbon dioxide

• It maintains the water pressure inside the sponge

Sponges get their food by 

• going through photosynthesis
• decomposing it
• sponges do not eat
• filter feeding

What is the name of the phylum sponges belong to?

• mammals
• chordate
• cnidarians
• Porifera

___________ are tiny hard particles that give a sponge support and can provide protection when they stick out of a sponge.

• spongin
• bones
• buds
• spicules

cells have sticky, funnel-shaped collar to collect food particles and a flagellum that creates a water current

• amoebocyte
• ostiocyte
• pinacocyte
• choanocyte

Sponges are primarily sessile organisms. What does this mean?

• They live permanently in one palce

• They move around their whole life

Which of the following type of cell digests and distributes food for the sponge?

• Choanocytes

• Amoebocytes

• Endodermal cells

• Epidermal cells

Asexual sponge reproduction where a piece of the adult sponge breaks off and settles in a new area growing to adulthood.

• broadcast spawning
• branching
• budding
• forcast spawning

Cnidarians have what type of symmetry?

• Asymmetry

• Radial

• Bilateral

• No symmetry