Question

In which of the following bryophytes, fragmentation of older thallus, the means of vegetative reproduction?

• A. Riccia
• B. Marchantia
• C. Anthoceros
  
• D. Both B and C

Answer 1

The correct option is A Riccia

Marchantia forms small green disc-shaped biconvex structures, gammae, inside little and shallow gemmae cups. Gemmae are the mode of vegetative reproduction and form thalli on the suitable soil. Means of vegetative reproduction in Riccia include fragmentation, adventitious branches, persistent apices and tuber formation; it does not form gemmae. Sphagnum reproduces vegetatively by formation of innovations. Anthoceros reproduce vegetatively by progressive growth and death of thallus, tubers, persistent apices and gemmae in few species. Thus, the correct answer is option D.