Phylum Porifera• Sessile filter feeders• Either asymmetrical or radially symmetrical• Body organized around a system of water canals and chambers• Skeletal elements may be (spicules) composed of calcium carbonate or silicon dioxide (silica)• Spongin present in some; tissue-grade organization.• Approximately 9,000 species - take the quiz

What type of feeders are Phylum Porifera?
Carnivorous
Herbivorous
Filter feeders
Omnivorous
How are Phylum Porifera's bodies organized?
Around a system of blood vessels
Around a system of air sacs
Around a system of water canals and chambers
Around a system of nerves
What are the skeletal elements of Phylum Porifera composed of?
Iron
Calcium carbonate
Silicon dioxide (silica)
Carbon
Which of the following is present in some Phylum Porifera?
Spongin
Chitin
Keratin
Collagen
How many species are approximately classified under Phylum Porifera?
5,000
7,500
9,000
12,000
Are Phylum Porifera asymmetrical or radially symmetrical?
Asymmetrical
Radially symmetrical
Bilaterally symmetrical
Spherically symmetrical
Which of the following is NOT a characteristic of Phylum Porifera?
Tissue-grade organization
Skeletal elements made of calcium carbonate
Skeletal elements made of silicon dioxide (silica)
Bilateral symmetry
What is the primary mode of feeding for Phylum Porifera?
Predation
Herbivory
Filter feeding
Parasitism
Which of the following is NOT a possible composition of Phylum Porifera's spicules?
Calcium carbonate
Silicon dioxide (silica)
Iron
Chitin
What is the term used to describe Phylum Porifera's body structure?
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