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Protonema occurs in the life cycle of [1990, 1993]
- a)Riccia
- b)Funaria
- c)Somatogamy
- d)Spirogyra
Correct answer is option 'B'. Can you explain this answer?
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Protonema occurs in the life cycle of [1990, 1993]a)Ricciab)Funariac)S...
In Funaria, the spore germinates to form a green multicellular structure called as protonema which later on develops into gametophyte. Presence of protonema is characteristic feature of moss.
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Protonema occurs in the life cycle of [1990, 1993]a)Ricciab)Funariac)S...
Protonema in the life cycle of Funaria
Protonema is a stage in the life cycle of mosses, specifically in the genus Funaria. This stage is characterized by a mass of green, branched, thread-like structures that arise from the germinating spores.
Function of Protonema
- Protonema serves as the primary stage of growth in mosses, helping establish the plant body before the development of the gametophyte.
- It absorbs water and nutrients from the environment, aiding in the growth and development of the moss plant.
Development of Protonema
- When a moss spore germinates, it gives rise to a protonema, which consists of a tangle of filaments.
- These filaments grow and branch, forming a network that eventually gives rise to the gametophyte stage of the moss plant.
Role of Protonema in reproduction
- Protonema is essential for the sexual reproduction of mosses as it produces the gametophores.
- Gametophores bear the sex organs of the moss plant, which are necessary for the production of gametes and subsequent fertilization.
Relation to other options
- Riccia, somatogamy, and Spirogyra are not directly related to the presence of protonema in the life cycle of Funaria.
- Riccia is a liverwort, somatogamy is a type of sexual reproduction, and Spirogyra is a type of green algae, each with distinct life cycle characteristics.
Protonema is a stage in the life cycle of mosses, specifically in the genus Funaria. This stage is characterized by a mass of green, branched, thread-like structures that arise from the germinating spores.
Function of Protonema
- Protonema serves as the primary stage of growth in mosses, helping establish the plant body before the development of the gametophyte.
- It absorbs water and nutrients from the environment, aiding in the growth and development of the moss plant.
Development of Protonema
- When a moss spore germinates, it gives rise to a protonema, which consists of a tangle of filaments.
- These filaments grow and branch, forming a network that eventually gives rise to the gametophyte stage of the moss plant.
Role of Protonema in reproduction
- Protonema is essential for the sexual reproduction of mosses as it produces the gametophores.
- Gametophores bear the sex organs of the moss plant, which are necessary for the production of gametes and subsequent fertilization.
Relation to other options
- Riccia, somatogamy, and Spirogyra are not directly related to the presence of protonema in the life cycle of Funaria.
- Riccia is a liverwort, somatogamy is a type of sexual reproduction, and Spirogyra is a type of green algae, each with distinct life cycle characteristics.
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Protonema occurs in the life cycle of [1990, 1993]a)Ricciab)Funariac)S...
B
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Protonema occurs in the life cycle of [1990, 1993]a)Ricciab)Funariac)Somatogamyd)SpirogyraCorrect answer is option 'B'. Can you explain this answer?
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