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Questions and Answers
What is the main function of the stamen in a flower?
Which part of the stamen is attached to the thalamus or petal of the flower?
How many microsporangia are typically present in each lobe of an angiosperm anther?
What is the term used to describe the anther having two theca in each lobe?
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What type of structure does an anther have in its transverse section?
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What develops further in microsporangia and becomes pollen sacs?
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What is the function of the outer three wall layers of a microsporangium in an anther?
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Which wall layer of a microsporangium nourishes the developing pollen grains?
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What is the function of tapetal cells in relation to pollen development?
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Why do tapetal cells generally possess more than one nucleus?
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Which type of cells occupy the center of each microsporangium when the anther is young?
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During microsporogenesis, what process do the cells of sporogenous tissue undergo?
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Study Notes
Function of the Stamen
- The stamen is the male reproductive part of a flower, responsible for producing pollen.
- It typically consists of two main parts: the anther and the filament.
Attachment of Stamen
- The filament, part of the stamen, attaches to the thalamus or petal of the flower.
Microsporangia in Angiosperm Anther
- Each lobe of an angiosperm anther typically contains four microsporangia.
Anther Structure
- An anther with two theca in each lobe is described as a dithecous anther.
- The transverse section of an anther reveals a complex layered structure.
Pollen Sacs Development
- Within microsporangia, microspore mother cells develop further and become pollen sacs.
Function of Wall Layers in Microsporangium
- The outer three wall layers of a microsporangium provide protection and structure for developing pollen grains.
Nourishment of Pollen Grains
- The inner wall layer of a microsporangium functions to nourish the developing pollen grains throughout their development.
Role of Tapetal Cells
- Tapetal cells play a crucial role in pollen development by supplying nutrients and substances needed for maturation.
- Tapetal cells generally possess more than one nucleus to enhance their metabolic capacity for supporting pollen growth.
Cell Types in Young Anther
- When the anther is young, it is primarily occupied by sporogenous cells in the center of each microsporangium.
Process During Microsporogenesis
- During microsporogenesis, the cells of sporogenous tissue undergo meiosis, resulting in the production of microspores.
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Description
Learn about the male reproductive organ (stamen) and the female reproductive organ (pistil) in flowering plants. This quiz focuses on the structure of the stamen, including the filament, anther, and pollen grain, as well as their functions in sexual reproduction.
