Question

Describe the process of Spore discharge in

the sporophyte of Riccia.​

Answer 1

Explanation:

The sporophyte generation is short-lived. It comprises a capsule which produces spores by meiosis and a stalk which holds this aloft the gametophyte.

The spores once released are dispersed by air currents and, once they settle somewhere moist, germinate. This recommences the gametophyte generation. The spore first produces a filamentous stage called a protonema. These cells are full of chloroplasts.

Answer 2

Answer:

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Fungi whose spores are contained in an ascus are known as Ascomycetes. When the spores are mature the ascus absorbs water. Insoluble materials in the cell are converted to soluble materials, causing internal pressure to build. When the pressure is high enough, the spores and the cytoplasm are explosively discharged.