Question

The spores germinate to produce dioecious thalloid gametophyte in

• A. Funaria
• B. Riccia
• C. Marchantia
• D. Anthoceros

Answer 1

The correct option is C

Marchantia

The correct option is C.

Explanation of the correct option:

1. Bryophytes are green, non-vascular plants that include ferns, mosses, and liverworts.
2. Marchantia is a bryophyte that gives rise to male and female sex organs on different thalli called antheridiophore and archegoniophore respectively.
3. Therefore, it is the first bryophyte to produce a dioecious gametophyte.

Explanation of the incorrect options:

Option A:

1. Funaria is monoecious as the male and female structures develop on different shoots of the same plant.
2. It grows best in presence of calcium, potassium, nitrogen, and phosphorous.

Option B:

1. Riccia is also monoecious and reproduces by asexual vegetative propagation and formation of haploid spores.
2. Riccia is a genus of floating liverwort resembling duckweed and characterized by a dichotomously branched thallus that may be floating, submerged, or rooted on damp soil.

Option D:

1. Anthoceros has both monoecious and dioecious species, however, the antheridia are produced before the archegonia.
2. Body oval with the antheridial wall.

Final answer: The spores germinate to produce dioecious thalloid gametophyte in Marchantia.