First slide
Basis of Classification
Question

Match the following and choose the correct option.

 Column I  Column II 
(a)Asymmetry(i)Pheretima
(b)Biradial symmetry(ii)Pleurobrachia
(c)Pentamerous radial symmetry(iii)Pila
(d)Bilateral symmetry(iv)Asterias

Easy
Solution

AsymmetryPila (secondarily asymmetrical; torsion occurs during their development)
Biradial symmetryPleurobrachia
Pentamerous radial symmetryAsterias
Bilateral symmetryPheretima

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