MICROSPOROGENESIS

Classification Of Gymnosperms|Classification |Economic Importance|NCERT|Angiosperms|General Characteristics|Flower Structure|Microsporophyll - Stamen|Microsporangia|Microsporogenesis|Male Gametophyte - Pollen Grain

Arrange the following in a sequence of stages of microsporogenesis (l) Microspore tetrads II. Microspore Mother cell III. Sporogenous tissue IV. Microspores dissociate from each other V. Release of pollen grains The correct sequence of stages is

Assertion : In a microsporangium, the tapetal cells possess tittle cytoplasm and generally have a single prominent nucleus. Reason : During microsporogenesis, the microspore mother cells (M M Cs) undergo mitotic divisions to produce hapliod microspore tetrads.

Angiosperms|Microsporophyll - Stamen|Microsporogenesis |Male Gametophyte - Pollen Grain|Megasporophyll - Pistil / Carpel|Megasporangia|Female Gametophyte - Embryo Sac|Pollination And Pollen Pistil Interaction|Double Fertilisation|Life Cycle|Post Fertilisation Changes|Classification Of Angiosperms|Monocots And Dicots|Economic Importance

(a) Draw a diagrammatic sketch of a transverse section of an anther of an angiosperm . Label its different walls and the tissue forming microspore mother cells. (b) Describe the process of microsporogenesis upto the formation of a microspore. (c) Write the function of 'germ pore' in a pollen grain of an angiosperm.