Give reasons for the following : (i) Bryophytes are called amphibians of plant kingdom. (ii) From phylum platyhelminthes onwards, animals are categorised as 'triploblastic.' (iii) The presence of 'coelom' in an animal's body is considered as advantageous

(i) Just like amphibians, bryophytes require water for fertilization as their gametes require aqueous medium for movement.
(ii) There are three layers of cells from which differentiated tissues can be made. This allows outside and inside body linings as well as some organs to be made. There is thus some degree of tissue formation.
(iii) Coelom is a true internal body cavity in which well-developed organs can be accommodated.