Animal Biology

Q: The cavity common to all sponges is _________ lined with flagellated choanocytes or collar cells

(a) :  Spongocoel
(b) :  Spicules
(c) :  Scleroblasts
(d) :  Choanocytes
(e) :  None of the Above
Answer:  Spongocoel
Explanation:  

Q: Phylum Porifera is divided into:

(a) :  Two calsses: calcispongiae and demospongiae
(b) :  Two calsses: lime sponges and glass sponges
(c) :  Three classes: calcispongiae and hexactinellida and hyalospongiae
(d) :  Three classes: calcarea, hyalospongiae and demospongiae
(e) :  None of the Above
Answer:  Three classes: calcarea, hyalospongiae and demospongiae
Explanation:  

Q: The remarkable power of regeneration is present in:

(a) :  Solitary sponges
(b) :  Colonial sponges
(c) :  Freshwater sponges
(d) :  All above
(e) :  None of the Above
Answer:  All above
Explanation:  

Q: Which system helps the sponges in food gathering, respiratory exchange and removal of wastes?

(a) :  Lump system
(b) :  Canal system
(c) :  Respiratory system
(d) :  None of these
(e) :  None of the Above
Answer:  Canal system
Explanation:  

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