Question

Compared with the gametophytes of the bryophytes, the gametophytes of vascular plants tend to be

(a) larger but to have smaller sex organs

(b) larger and to have large sex organs

(c) smaller and to have smaller sex organs

(d) smaller but to have larger sex organs

Answer 1

Correct option  (c) smaller and to have smaller sex organs

Explanation:

As we proceed from Thallophyta to angiosperms, there is a gradual reduction in gametophyte with the reduced size of sex organs. From Thallophyta to angiosperms, there is progressive elaboration of sporophytes.

Phase	Thallop-hyta	Bryop-hyta	pterido- phyta	Gymnos-perms	Angios-perms
Gametophyte (%)	90	75	50	25	10
Sporhyte(%)	10	25	50	75	90