Question

Distinguish between the following by giving one main point : 

(i) Worm and Snake. 

(ii) Bony fishes and Cartilaginous fishes. 

(iii) Ovipary and Vivipary.

Answer 1

(i) Differences between Worm and Snake :

S.No.	Worm	Snake
(i)	Elongated animals, Scales and shields absent	Limbs absent. scales and shields are present
(ii)	It includes platyhel minthes, aschelminthes and annelida worms.	They are included in reptilia.

(ii) Differences between Bony fishes and Cartilaginous fishes :

S.No.	Bony fishes	Cartilaginous fishes
(i)	Endoskeleton is bony	Endoskeleton is Cartilaginous.

(iii) Differences between Ovipary and Vivipary :

S.No.	Ovipary	Vivipary
(i)	A phenomenon of laying eggs. E.g., Prototheria.	A phenomenon of producing young ones e.g., Eutheria.