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Questions and Answers
What is the role of the tapetum in the anther?
What is the role of the tapetum in the anther?
- It helps in the formation of microspores.
- It nourishes the developing pollen grains. (correct)
- It separates the two thecae of the anther.
- It protects the anther from environmental damage.
Which statement correctly describes the microsporangium in flowering plants?
Which statement correctly describes the microsporangium in flowering plants?
- It does not play a role in microspore formation.
- It develops into pollen sacs filled with pollen grains. (correct)
- It is surrounded by a single layer called the epidermis.
- Each lobe contains only one microsporangium.
What kind of structure is a typical angiosperm anther?
What kind of structure is a typical angiosperm anther?
- Multilobed and dikaryotic
- Unilobed and octhecous
- Bilobed and dithecous (correct)
- Quadrilobed and hexadecuous
During microsporogenesis, what process takes place in the microsporangium?
During microsporogenesis, what process takes place in the microsporangium?
What is the structure that attaches the anther to the flower called?
What is the structure that attaches the anther to the flower called?
Flashcards
Stamen
Stamen
The male reproductive part of a flower, consisting of filament and anther.
Anther Structure
Anther Structure
A bilobed and dithecous structure containing microsporangia, separated by a groove.
Microsporangium
Microsporangium
A structure within an anther that develops into pollen sacs filled with pollen grains.
Microsporogenesis
Microsporogenesis
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Tapetum
Tapetum
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Study Notes
Stamen and Pollen Grain Structure
- The stamen is comprised of a filament (stalk) and an anther (terminal structure)
- The anther is bilobed (dithecous), with two microsporangia (pollen sacs) in each lobe
- Microsporangia are layered with epidermis, endothecium, middle layers and tapetum
- Tapetum nourishes developing pollen grains
- The anther's structure is tetragonal (four-sided)
Microsporogenesis
- Sporogenous tissue within microsporangia undergoes meiosis to produce microspore tetrads
- Microspore tetrads have a specific ploidy, determined by meiotic divisions
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