MCQ
Which one of the following is a distinctive character of Class Bivalvia of the phylum Mollusca?
- APresence of a coiled shell
- BPresence of arms or tentacles around the mouth
- CAbsence of gills
- DAbsence of a head
✓
Answer
D. Absence of a head
Explanation:
Bivalvia is a Class of Mollusca having a shell composed of the right and left halves. They lack a head. Hence, the absence of the head is a characteristic of Class Bivalvia.
Explanation:
Bivalvia is a Class of Mollusca having a shell composed of the right and left halves. They lack a head. Hence, the absence of the head is a characteristic of Class Bivalvia.
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