Question

A dioecious gametophyte is seen in the case of______________.
A. Funaria
B. Riccia
C. Marchantia
D. Anthoceros

Answer 1

Hint:-Dioecy is a species trait, meaning that it has different individual species or colonies that are male and female, meaning that a colony includes only individuals that are male or female.

Complete answer:
As a modern model system, one of the classical research plants in plant biology, Marchantia polymorpha, is attracting interest. The species has been drawn to attention by its ease of genetic transformation and a genome sequencing project. The dioecious species Marchantia polymorpha has male and female organs on various thalli. On the umbrella-like sexual branches of the female and male thalli, respectively, female and male gametangia, known as the 'archegonium' and 'antheridium' are formed. A single egg is produced in the center of each Archegonium. An antheridium produces multiple male motile gametes. To fertilise it, the sperm cells enter the egg through certain means.

Hence, Option C is the right answer.

Additional Information:
For protonema and thallus growth, Marchantia polymorpha appears to require more bright light than other liverworts. An asymmetric division results in one large and one small cell when the spore germinates. The small cell divides into the first rhizoid and, in the same direction, the broad cell continues to differentiate many times. The young protonema, therefore, usually has rhizoids at one terminal.

Note:-
The Marchantia polymorpha common liverwort is a nearly cosmopolitan species occurring in temperate regions around the human habitat. This species had been described in herbal literature long before modern plant taxonomic research was applied, beginning with Greek philosophers such as Aristotle and Theophrastus. The word 'liverwort' is derived from thalloid liverworts such as Marchantia, a liver-shaped type.