Basically, plants have two stages in their life cycle, they can appear as a gametophyte or a sporophyte.
gametophyte: The gamete-bearing individual or phase in the life cycle of a plant having alternation of generations sporophyte: The spore-producing individual or phase in the life cycle of a plant having alternation of generations
The gametophyte has become smaller, and the sporophyte has become larger. To begin with main plant body was gametophytic and sporophyte was dependent on it. Later on, as the evolution progressed, both gametophyte and sporophyte became independent and ultimatly gametophyte became dependent on sporophyte.
The sporophyte generation is the result of the fusion of gametes. :)
Cycas plant has alternation of gametophyte and sporophyte generations. The main plant body is sporophyte and it bears the male cone and megasporophylls. The male and female gamentes are produced in the male cone and megasporophyll respectively. After pollination and fertilization of ovules the seeds are produced on megasporophylls. These seeds on maturity disperse and germinate to produce a new sporophyte. Male and female cycas plants grow separately.
The gametophyte and the sporophyte stages of a plant alternate to complete the life cycle.
In reference to the sporophyte and gametophyte, are the stages of the plant's life cycle thus being the same.
gametophyte: The gamete-bearing individual or phase in the life cycle of a plant having alternation of generations sporophyte: The spore-producing individual or phase in the life cycle of a plant having alternation of generations
The Sporophyte stage and the gametophyte stage
Plants have two phases during reproduction: sporophyte and gametophyte. The sporophyte is doploid and the gametophyte is haploid. Plants cycle between these seasonally.
The gametophyte has become smaller, and the sporophyte has become larger. To begin with main plant body was gametophytic and sporophyte was dependent on it. Later on, as the evolution progressed, both gametophyte and sporophyte became independent and ultimatly gametophyte became dependent on sporophyte.
The sporophyte generation is the result of the fusion of gametes. :)
Two different forms a plant can have.
A mature sporophyte produces the spores. Likewise a mature gametophyte produces the gametes. The life cycle of the plant is completed by the alternation of these two generations.
The Sporophyte stage and the gametophyte stage
In most plants, the sporophyte generation is dominant. In fern, for example, the fern itself is the sporophyte. This organism produces spores that fall to the substrate below and grow into a separate organism called a gametophyte. The gametophyte produces sperm and eggs in order to produce a new sporophyte which grows out of the gametophyte's body, destroying it. It is important to note that the gametophyte is haploid and the sporophyte is dploid.
Cycas plant has alternation of gametophyte and sporophyte generations. The main plant body is sporophyte and it bears the male cone and megasporophylls. The male and female gamentes are produced in the male cone and megasporophyll respectively. After pollination and fertilization of ovules the seeds are produced on megasporophylls. These seeds on maturity disperse and germinate to produce a new sporophyte. Male and female cycas plants grow separately.
ferns