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Question
How many generations are found in seed of gymnosperm?
How many generations are found in seed of gymnosperm?
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Solution
The correct option is D 3
The sporophyte (2n) phase is the longest phase. The gametophytes (1n), microspores and megaspores, are reduced in size. This phase may take more than one year between pollination and fertilization, while the pollen tube grows towards the megasporocyte (2n), which undergoes meiosis into megaspores. The megaspores will mature into eggs (1n) .
Gymnosperm seed is made up of three generations of tissues.
1) maternal sporophyte tissue (seed coat and nucellus),
2) gametophyte
3) daughter sporophyte (embryo)Hence the correct option is D.
The sporophyte (2n) phase is the longest phase. The gametophytes (1n), microspores and megaspores, are reduced in size. This phase may take more than one year between pollination and fertilization, while the pollen tube grows towards the megasporocyte (2n), which undergoes meiosis into megaspores. The megaspores will mature into eggs (1n) .
Gymnosperm seed is made up of three generations of tissues.
1) maternal sporophyte tissue (seed coat and nucellus),
2) gametophyte
3) daughter sporophyte (embryo)
Hence the correct option is D.
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