Phylum Porifera
13 Questions
| Total Attempts: 687
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In this quiz, we’ll be taking a closer look at sponges, or perhaps more specifically known as phylum Porifera – a multicellular organism which has a body filled with pores and channels through which water circulates. What can you tell us?
Questions and Answers
- 1.A Phylum of porous, ________, _________ feeding animals.
- 2.Those in phylum porifera are
- A.
Radially symmetrical
- B.
Asymmetrical
- C.
Bisymmetrical
- D.
Inversely symmetrical
- 3.They have skeletons of ________ or ________ carbonate forming ________ or _______.
- 4.Porifera contain no tissue or organs
- A.
True
- B.
False
- 5.They possess three basic cell types: ____________, ____________, and _____________.
- 6.What is the first taxon that exhibits specialization of cell types?
- A.
Cnidaria
- B.
Porifera
- C.
Platyhelminthes
- 7.What are flattened cells that cover the outer surface of the sponge.
- A.
Archaeocytes
- B.
Choanocytes
- C.
Pinacocytes
- 8.Pinacocytes may be contractile and specialized into _________ which are tube like cells that _______ water flow through the sponge.
- 9.Archaeocytes are specialized for: _______, _________ ________ ________, _________ _______, ________
- 10.Where are archaeocytes found?
- A.
Inner chambers or wall of the sponge
- B.
Jelly like layer just below the pinacocytes
- C.
The outer surface of the sponge
- 11.Where are choanocytes found?
- A.
Inner chambers or wall of the sponge
- B.
Jelly like layer just below the pinacocytes
- C.
The outer surface of the sponge
- 12.Choanocytes are ________ cells with collar like ring of ________ connected by microfiliaments forming a net like mesh.
- 13.______ ________ are created by the flagella on the __________that draw microscopic food particles across their net.
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