Distinguish between the following by giving one main point:
(a)Worm and Snake.
(b)Bony fishes and Cartilaginous fishes.
©Ovipary and Vivipary.
(a) Differences between Worm and Snake :
Worm:
1.Elongated animals,scales and shields absent.
2.It includes platyhel minthes, aschelminthes and annelida worms.
3.Limbs absent. Setae absent.
Snake:
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:
Bony fishes:
1.Endoskeleton is bony.
Cartilaginous fishes:
1.Endoskeleton is cartilagenous.
(c) Differences between Ovipary and Vivipary:
Ovipary:
1.A phenomenon of laying eggs.e.g.,Prototheria.
Vivipary:
1.A phenomenon of producing young ones e.g., Eutheria.