MCQ
Cylindrical bodied, worm-like marine animals belong to the phylum:
- AEchinodermata
- BMollusca
- CCoelenterata
- ✓Hemichordata
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Statement $I:$ Endarch and exarch are the terms often used for describing the position of secondary xylem in the plant body.
Statement $II:$ Exarch condition is the most common feature of the root system.
In the light of the above statements, choose the correct answer from the options given below:
$R$ : It allowed the animal to have an alimentary canal longer than the body & space for storing gametes.