Sexual Reproduction in Plants: Pre-Fertilisation Structures and Events
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Questions and Answers

What is the function of the filament in a stamen?

  • It produces the pollen grains
  • It facilitates fertilization
  • It supports the anther (correct)
  • It protects the microsporangia

    • How many thecae are present in the anther of a typical stamen?

  • 6
  • 4 (correct)
  • 8
  • 2

    • What is the term used to describe the formation of microspores from a pollen mother cell?

  • Microgametogenesis
  • Microsporogenesis (correct)
  • Pollination
  • Gametogenesis

    • Which of the following structures represents the male gametophyte in a flowering plant?

    <p>Pollen grain</p> Signup and view all the answers

    What are the two cells present in a mature pollen grain?

    <p>Vegetative cell and generative cell</p> Signup and view all the answers

    Explain the structure of a stamen in a flower and its components.

    <p>A stamen consists of a filament, which is a slender stalk, and an anther, which is a bilobed structure with two thecae per lobe.</p> Signup and view all the answers

    Describe the process of microsporogenesis and its significance in sexual reproduction of plants.

    <p>Microsporogenesis is the formation of microspores through meiosis from a pollen mother cell. It is significant as microspores develop into pollen grains, representing male gametophytes.</p> Signup and view all the answers

    What is the role of the pollen sacs in the anther of a stamen?

    <p>The pollen sacs in the anther are where microsporangia develop, ultimately giving rise to pollen grains.</p> Signup and view all the answers

    Differentiate between the generative cell and the vegetative cell in a mature pollen grain.

    <p>The generative cell in a pollen grain is responsible for forming sperm cells, while the vegetative cell supports and nourishes the generative cell.</p> Signup and view all the answers

    Explain the significance of the androecium and gynoecium in the sexual reproduction of flowering plants.

    <p>The androecium contains the male reproductive structures, while the gynoecium contains the female reproductive structures, facilitating pollination and fertilization in plants.</p> Signup and view all the answers

    Study Notes

    Male Reproductive Structures

    • A stamen consists of two parts: a filament (slender and long stalk) and an anther (bilobed structure)
    • Each lobe of the anther has two thecae, making it dithecous
    • The anther is a tetragonal structure with microsporangia at the edge, two per lobe
    • Microsporangia develop into pollen sacs later on

    Pollen Grain Formation

    • Microsporogenesis is the formation of microspores through meiosis from a pollen mother cell
    • Pollen grains represent the male gametophytes
    • Mature pollen grains consist of two cells: vegetative cells and generative cells

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    Description

    Learn about the pre-fertilisation structures and events in sexual reproduction of plants. This quiz covers topics such as male and female reproductive structures in flowers, development of stamen, microsporangium, and pollen grain.

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