MCQ
Earthworm has no skeleton. During burrowing anterior end becomes turgid and acts as hydraulic skeleton. It is due to:
- AGut peristalsis
- BSetae
- ✓Coelomic fluid
- DBlood.
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| Column-$I$ | Column-$II$ |
| (Chromosome) | (Position of Centromere) |
| $A$. Metacentric | $I$. At the tip |
| $B$. Submetacentric | $II$. Almost near the tip |
| $C$. Acrocentric | $III$. At the middle |
| $D$. Telocentric | $IV$. Slightly away from the middle |