Sexual Reproduction in Flowering Plants
54 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is a characteristic of the egg cell in Type 1 apomixis?

  • It is triploid (3n)
  • It is tetraploid (4n)
  • It is haploid (n)
  • It is diploid (2n) (correct)

    • In Type 2 apomixis, what is the origin of the nucellar cells that penetrate into the embryo sac?

  • They are derived from the pollen tube
  • They are derived from the female gametophyte
  • They are derived from the egg cell
  • They are derived from the nucellus cells (correct)

    • What is the term for the occurrence of more than one embryo in a seed?

  • Polyembryony (correct)
  • Apomixis
  • Hybridization
  • Fertilization

    • What is the advantage of producing hybrid seeds through apomixis?

    <p>It maintains the hybrid nature of the seeds</p> Signup and view all the answers

    What is the role of the nucellus cells in Type 2 apomixis?

    <p>They penetrate into the embryo sac and start dividing</p> Signup and view all the answers

    What is the result of multiple egg cells giving rise to the zygotic embryo in Type 1 apomixis?

    <p>The formation of a single zygotic embryo</p> Signup and view all the answers

    What happens to the generative cell in a 2-celled pollen during pollen-pistil interaction?

    <p>It divides to form two male gametes</p> Signup and view all the answers

    Where do the male gametes enter during fertilization?

    <p>Through the micropylar end of the embryo sac</p> Signup and view all the answers

    What is the process called when one male gamete fuses with the egg nucleus to form the zygote?

    <p>Syngamy</p> Signup and view all the answers

    What stops growing during fertilization?

    <p>The pollen tube</p> Signup and view all the answers

    What is the process of formation of zygote by the fusion of male and female gametes?

    <p>Fertilisation</p> Signup and view all the answers

    What is the other term for the fusion of one male gamete with the egg nucleus to form the zygote?

    <p>Syngamy</p> Signup and view all the answers

    What is the result of triple fusion during double fertilization?

    <p>Formation of a primary endosperm nucleus</p> Signup and view all the answers

    What type of endosperm development is characterized by the primary endosperm nucleus dividing repeatedly without cytokinesis?

    <p>Nuclear type</p> Signup and view all the answers

    Through which part of the ovule does the pollen tube enter during fertilization?

    <p>Micropyle</p> Signup and view all the answers

    What is the main source of nutrition for the embryo in the seed?

    <p>Endosperm</p> Signup and view all the answers

    What type of fertilization occurs when the pollen tube enters the ovule through the integuments?

    <p>Chalazogamy</p> Signup and view all the answers

    What is the term for the process of development of the embryo from the zygote?

    <p>Embryo development</p> Signup and view all the answers

    What is the position of the scutellum in the monocot embryo?

    <p>Towards one side of the embryonal axis</p> Signup and view all the answers

    Which part of the seed coat protects the developing embryo?

    <p>Integuments</p> Signup and view all the answers

    What is the function of the coleorhiza in the monocot embryo?

    <p>It encloses the radical and root cap</p> Signup and view all the answers

    What is the term for the hollow foliar structure that encloses the shoot apex and leaf primordia in the monocot embryo?

    <p>Coleoptile</p> Signup and view all the answers

    What is the part of the seed that is used by the embryo to grow?

    <p>Food reserves</p> Signup and view all the answers

    What is the opening through which the pollen tube enters the ovule during fertilization?

    <p>Micropyle</p> Signup and view all the answers

    What is the fate of the majority of the megaspores formed during megasporogenesis?

    <p>They degenerate, leaving only one functional megaspore</p> Signup and view all the answers

    What is the primary function of the integuments in the ovule?

    <p>To protect the ovule from external damage</p> Signup and view all the answers

    In which part of the ovule is the megaspore mother cell typically located?

    <p>Micropylar end</p> Signup and view all the answers

    What is the term for the small opening in the ovule through which the pollen tube penetrates?

    <p>Micropyle</p> Signup and view all the answers

    What is the structure that contains the female gametophyte and is located inside the nucellus?

    <p>Embryo sac</p> Signup and view all the answers

    What is the process by which a megaspore is formed from a megaspore mother cell?

    <p>Megasporogenesis</p> Signup and view all the answers

    What is the function of the endothecium in the microsporangium?

    <p>Protection and assistance in dehiscence</p> Signup and view all the answers

    What is the number of sporangia present in each microsporangium?

    <p>4</p> Signup and view all the answers

    What is the location of the microsporangia in the anther?

    <p>At the corner of the anther</p> Signup and view all the answers

    What is the role of the tapetum in the microsporangium?

    <p>Nutrition to the developing pollen grains</p> Signup and view all the answers

    What is the process that occurs inside the sporogenous tissue at the center of each microsporangium?

    <p>Microsporogenesis</p> Signup and view all the answers

    What is the tissue that undergoes meiosis to produce gametes in the microsporangium?

    <p>Sporogenous tissue</p> Signup and view all the answers

    What is the function of the integuments in the ovule?

    <p>To protect the ovule</p> Signup and view all the answers

    Where is the embryo sac located in the ovule?

    <p>Inside the nucellus</p> Signup and view all the answers

    What is the result of meiosis II in megasporogenesis?

    <p>Formation of a megaspore tetrad</p> Signup and view all the answers

    What is the small opening in the ovule through which the pollen tube penetrates?

    <p>Micropyle</p> Signup and view all the answers

    What is the region of the ovule near the micropyle?

    <p>Micropylar end</p> Signup and view all the answers

    How many megaspores are typically functional at the end of megasporogenesis?

    <p>One</p> Signup and view all the answers

    Where is the megaspore mother cell typically located?

    <p>In the nucellus</p> Signup and view all the answers

    What is the function of the integuments in the ovule?

    <p>To protect the developing embryo</p> Signup and view all the answers

    What is the small opening in the ovule through which the pollen tube penetrates?

    <p>Micropyle</p> Signup and view all the answers

    What is the structure that contains the female gametophyte and is located inside the nucellus?

    <p>Embryo sac</p> Signup and view all the answers

    What is the term for the process of development of the embryo from the zygote?

    <p>Embryogenesis</p> Signup and view all the answers

    What is the function of the coleorhiza in the monocot embryo?

    <p>To protect the radical and root cap</p> Signup and view all the answers

    What is the outermost layer of the microsporangium wall?

    <p>Epidermis</p> Signup and view all the answers

    What is the function of the endothecium in the microsporangium?

    <p>Aiding in dehiscence of anther</p> Signup and view all the answers

    What is the innermost layer of the microsporangium wall?

    <p>Tapetum</p> Signup and view all the answers

    How many sporangia are present in each microsporangium?

    <p>4</p> Signup and view all the answers

    Which tissue undergoes meiosis to produce gametes in the microsporangium?

    <p>Sporogeneous tissue</p> Signup and view all the answers

    Where does Microsporogenesis occur?

    <p>In the sporogenous tissue</p> Signup and view all the answers

    More Like This

    Apomixis
    20 questions

    Apomixis

    StylizedChrysocolla avatar
    StylizedChrysocolla
    Fruit Classification and Apomixis
    32 questions

    Fruit Classification and Apomixis

    IllustriousMahoganyObsidian avatar
    IllustriousMahoganyObsidian
    Apomixis and Asexual Reproduction in Plants Quiz
    5 questions

    Apomixis and Asexual Reproduction in Plants Quiz

    StimulativeDiscernment avatar
    StimulativeDiscernment
    Sistemi Riproduttivi nelle Piante
    40 questions

    Sistemi Riproduttivi nelle Piante

    TriumphantNovaculite8373 avatar
    TriumphantNovaculite8373
    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser