Describe about pistil (gynoecium).
Describe about pistil (gynoecium).
The gynoecium represents the female reproductive part of the flower.
The gynoecium may consist of a single pistil (monocarpellary) or may have more than one pistil (multicarpellary).
When there are more than one the pistils may be fused together (syncarpous) or may be free (apocarpous) structure of pistil.
Each pistil has three parts the stigma, style and ovary.
Stigma : The stigma serves as a landing platform for pollen grains.
Style : The style is the elongated slender part beneath the stigma.
Ovary : The basal bulged part of the pistil is the ovary.
Placenta : It is located inside the ovarian cavity. Arising from the placenta are the megasporangia, commonly called ovules. The number of ovules in an ovary may be one (wheat, paddy, mango) to many (papaya, watermelon, orchids).
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Two nuclei with one cell are found in
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In angiosperms, the following events occur during megasporogenesis and megagametogenesis
$(i)$ Differentiation of megaspore mother cells
$(ii)$ Meiosis of the megaspore mother cell
$(iii)$ Formation of a linear tetrad
$(iv)$ Mitotic division of the functional megaspore
$(v)$ Degeneration of 3 megaspores
$(vi)$ Formation of embryo sac
$(vii)$ Fusion of polar nuclei
The correct sequence is
In angiosperms, the following events occur during megasporogenesis and megagametogenesis
$(i)$ Differentiation of megaspore mother cells
$(ii)$ Meiosis of the megaspore mother cell
$(iii)$ Formation of a linear tetrad
$(iv)$ Mitotic division of the functional megaspore
$(v)$ Degeneration of 3 megaspores
$(vi)$ Formation of embryo sac
$(vii)$ Fusion of polar nuclei
The correct sequence is
Synergids are which type ?
Synergids are which type ?