Podcast Beta
Questions and Answers
The microsporangia develop further and become pollen sacs. They extend longitudinally all through the length of an anther and are packed with pollen grains. Structure of microsporangium: In a transverse section, a typical microsporangium appears near ______ circular in outline.
three-dimensional cut section of an anther
The outer three wall layers of a microsporangium perform the function of protection and help in dehiscence of anther to release the pollen. The innermost wall layer is the ______.
tapetum
Cells of the tapetum possess dense cytoplasm and generally have more than one ______.
nucleus
When the anther is young, a group of compactly arranged homogenous cells called the sporogenous tissue occupies the centre of each microsporangium. Microsporogenesis: As the anther develops, the cells of the sporogenous tissue undergo ______ divisions to form microspore tetrads.
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Can you think of how tapetal cells could become bi-nucleate? Tapetal cells could become bi-nucleate through ______ divisions.
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Each cell of the sporogenous tissue is capable of giving rise to a microspore ______
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The process of formation of microspores from a pollen mother cell (PMC) through meiosis is called ______
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The microspores, as they are formed, are arranged in a cluster of four cells-the microspore ______
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Inside each microsporangium several thousands of microspores or pollen grains are formed that are released with the dehiscence of ______
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Pollen grains represent the male ______
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