Salient Features and Classification of Animals-nonchordate up to Phyla Level and Chordate up to Classes Level NEET Questions

Biology - Diversity in Living World

Salient Features and Classification of Animals-nonchordate up to Phyla Level and Chordate up to Classes Level MCQ Questions


13.
Notochord is a:
A.
Mesodermally derived rod-like structure formed on the dorsal side during embryonic development
B.
Endodermal structure
C.
Ectodermal structure
D.
Vascular structure
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ANSWER :
A. Mesodermally derived rod-like structure formed on the dorsal side during embryonic development
14.
Sponges belong to phylum:
A.
Porifera
B.
Coelenterata
C.
Platyhelminthes
D.
Cnidaria
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ANSWER :
A. Porifera
15.
The water transport (canal) system is a unique feature of:
A.
Coelenterates
B.
Porifera (sponges)
C.
Aschelminthes
D.
Annelids
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ANSWER :
B. Porifera (sponges)
16.
In sponges, the choanocytes (collar cells) line the:
A.
Outer surface
B.
Spongocoel and canals
C.
Endodermal lining of intestine
D.
Coelom
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ANSWER :
B. Spongocoel and canals
17.
Digestion in sponges is:
A.
Extracellular only
B.
Intracellular only
C.
Intracellular and extracellular
D.
Absent
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ANSWER :
B. Intracellular only
18.
The body of sponges is supported by:
A.
A skeleton of bones
B.
A skeleton of spicules (calcareous or siliceous) or spongin fibres
C.
Chitin
D.
Cartilage
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ANSWER :
B. A skeleton of spicules (calcareous or siliceous) or spongin fibres