A) Riccia
B) Funaria
C) Liverworts
D) Marchantia
Correct Answer: D
Solution :
The cells of the sporogenous tissue in developing sporogonium of Marchantia are at first, all alike and vertically elongated. They divide diagonally. Later they become differentiated into the following two kinds of cells. Elater mother cells: Practically half of the sporogenous cells elongate still further. They become narrow and remain sterile. These are the elater mother cells. The latter elongate considerably to form long, slender, diploid, fusiform cells tapering at both the ends. Each of these develops two spirally thickened bands on the inner surface of its walls and loses its protoplasmic contents to become the elater. The diploid bispiral elaters are hygroscopic. They help in the dispersal of spores. Spore mother cells: The other half of the sporogenous cells divide and redivide by transverse cleavage to form vertical rows of cells. These are the spore mother cells. There is good deal of evidence to support the view that the elaters and spore mother cells do not belong to the same cell generation. The spore mother cell undergoes meiosis to form four meiospores.
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