Sexual Reproduction and Plant Propagation Techniques
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Sexual Reproduction and Plant Propagation Techniques

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Questions and Answers

What is the correct sequence of events in the fertilization process of flowers?

  • Zygote forms and immediately develops into a flower.
  • Stigma collects the pollen, and male gametes float to the ovary.
  • Pollen lands on the anther, then reaches the ovary.
  • Pollen tube reaches the ovule, and male and female gametes fuse. (correct)

    • Which of the following best describes grafting in plants?

  • Planting a branch in soil to root it.
  • Cutting a plant to encourage new growth.
  • Joining two plants so they grow as one. (correct)
  • Growing a plant from a single seed.

    • How does coconut fruit facilitate its dispersal through water?

  • Its fibrous outer coat allows it to float. (correct)
  • It releases seeds that can swim.
  • It produces edible seeds that attract animals.
  • It has hard, dense flesh that prevents sinking.

    • What causes the cottony growth observed on bread and fruits during the rainy season?

    <p>Development of mold from airborne spores.</p> Signup and view all the answers

    In plant layering, what is the critical feature of the branch used?

    <p>It must be flexible and have at least one node.</p> Signup and view all the answers

    Which of the following statements about zygotes is accurate?

    <p>Zygotes divide to form embryos inside seeds after fertilization.</p> Signup and view all the answers

    Which method is not associated with vegetative propagation?

    <p>Sowing seeds</p> Signup and view all the answers

    What is the outcome of the fusion of male and female gametes in the ovule?

    <p>Development of a zygote.</p> Signup and view all the answers

    Study Notes

    Sexual Reproduction in Plants

    • Fertilization occurs when a pollen grain lands on the stigma of a flower.
    • The pollen grain germinates, forming a pollen tube that grows through the style and reaches the ovary.
    • The pollen tube releases male gametes, which fuse with female gametes inside the ovule, forming a zygote.
    • The zygote divides repeatedly to form an embryo, which develops within the seed.

    Propagation Techniques

    • Grafting: Joining two plants together, a stem from one plant (scion) to the root system of another (stock).
    • This technique is used to propagate improved cultivars of flowers and fruits, like mangoes, apples, and citrus fruits.
    • Layering: Bending a branch towards the ground, covering a portion with soil, and leaving the tip exposed.
    • As roots develop from the buried portion, the branch is cut from the parent plant, forming a new plant.

    Water Dispersal

    • Fruits with fibrous or spongy outer coverings are adapted for water dispersal.
    • The coconut fruit's fibrous coat allows it to float and travel long distances.

    Fungal Growth

    • Bread mould, a type of fungus, is commonly observed on food items like bread and fruits when exposed to moisture for prolonged periods.
    • Spores present in the air germinate and grow in moist environments, producing fungal growth.

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    Related Documents

    Reproduction in Plants Notes 2024-25 PDF

    Description

    Explore the fascinating processes of sexual reproduction in plants, including fertilization and zygote formation. Additionally, learn about propagation techniques such as grafting and layering, which are essential for cultivating new plants. This quiz will deepen your understanding of how plants reproduce and spread.

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