(a) Differences between Worm and Snake :
1.Elongated animals,scales and shields absent.
2.It includes platyhel minthes, aschelminthes and annelida worms.
3.Limbs absent. Setae absent.
1.Limbs absent. Scales and shields are absent.
2.They are included in reptilia.
3.They lay eggs.
(b) Differences between Bony fishes and Cartilaginous fishes:
1.Endoskeleton is bony.
1.Endoskeleton is cartilagenous.
(c) Differences between Ovipary and Vivipary:
1.A phenomenon of laying eggs.e.g.,Prototheria.
1.A phenomenon of producing young ones e.g., Eutheria.