CR Biology B Module 4 Lesson 2
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CR Biology B Module 4 Lesson 2

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Questions and Answers

What is the process by which spores form in plants?

  • Binary fission
  • Fertilization
  • Mitosis
  • Meiosis (correct)
  • What type of reproduction do gametophytes primarily engage in?

  • Sexual reproduction by binary fission
  • Asexual reproduction through spores
  • Sexual reproduction through fertilization (correct)
  • Asexual reproduction through vegetative means
  • How do most modern plants primarily reproduce?

  • Through direct cell division
  • Through vegetative propagation only
  • By producing spores
  • By using pollen and seeds (correct)
  • Which part of the plant life cycle represents the diploid stage?

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

    What are the horizontal stems of strawberry plants that can form new plants called?

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

    What characteristic do spores have that aids their reproduction?

    <p>Can grow without fertilization</p> Signup and view all the answers

    During which generation do plants spend most of their life cycle?

    <p>Diploid sporophyte generation</p> Signup and view all the answers

    In the life cycle of plants, alternation of generations involves which two types of generations?

    <p>Haploid and diploid</p> Signup and view all the answers

    What type of reproduction occurs when plants use roots, stems, or leaves?

    <p>Vegetative reproduction</p> Signup and view all the answers

    What is formed when gametes fuse during the sexual cycle of plants?

    <p>Diploid sporophyte</p> Signup and view all the answers

    Spores are produced by meiosis.

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

    The kangaroo fern is also known as the cheetah fern.

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

    Haploid individuals are known as sporophytes.

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

    Modern plants primarily reproduce sexually using spores.

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

    Asexual reproduction in plants can occur through roots, stems, or leaves.

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

    All plants spend most of their life cycle as haploid gametophytes.

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

    Gametes are produced by mitosis during asexual reproduction.

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

    Stolons are the horizontal stems of strawberry plants that form new plants.

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

    The life cycle of a plant involves only sexual reproduction.

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

    Alternation of generations refers to the switch between haploid and diploid stages in the plant cycle.

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

    Study Notes

    Plant Reproduction

    • Plants reproduce through both sexual and asexual methods, not solely relying on pollinators like birds and bees.
    • The kangaroo fern features spots that are spores, which are reproductive units that can grow into new individuals without fertilization.

    Life Cycle of Plants

    • All plants exhibit a life cycle characterized by alternation of generations between haploid and diploid stages.
    • The diploid sporophyte generation undergoes meiosis to produce haploid spores.
    • Asexual reproduction occurs through spores, yielding haploid individuals known as gametophytes.
    • Gametophytes generate haploid gametes via mitosis; these gametes can later fuse during sexual reproduction to form a diploid sporophyte.

    Early vs. Modern Plants

    • Early plants primarily reproduced via spores and spent most of their life cycle in the haploid gametophyte stage.
    • Spores require minimal resources for production and can develop into new plants independently.
    • Modern plants predominantly use gametes, evidenced by pollination processes leading to seed formation, with a longer lifespan in the diploid sporophyte stage.
    • Many modern plants also engage in asexual reproduction through vegetative methods, such as utilizing roots, stems, or leaves.

    Example of Asexual Reproduction

    • Strawberry plants demonstrate a form of asexual reproduction using stolons, which are horizontal stems that spread across the ground, potentially forming new plants when they take root.

    Plant Reproduction

    • Plants reproduce through both sexual and asexual methods, not solely relying on pollinators like birds and bees.
    • The kangaroo fern features spots that are spores, which are reproductive units that can grow into new individuals without fertilization.

    Life Cycle of Plants

    • All plants exhibit a life cycle characterized by alternation of generations between haploid and diploid stages.
    • The diploid sporophyte generation undergoes meiosis to produce haploid spores.
    • Asexual reproduction occurs through spores, yielding haploid individuals known as gametophytes.
    • Gametophytes generate haploid gametes via mitosis; these gametes can later fuse during sexual reproduction to form a diploid sporophyte.

    Early vs. Modern Plants

    • Early plants primarily reproduced via spores and spent most of their life cycle in the haploid gametophyte stage.
    • Spores require minimal resources for production and can develop into new plants independently.
    • Modern plants predominantly use gametes, evidenced by pollination processes leading to seed formation, with a longer lifespan in the diploid sporophyte stage.
    • Many modern plants also engage in asexual reproduction through vegetative methods, such as utilizing roots, stems, or leaves.

    Example of Asexual Reproduction

    • Strawberry plants demonstrate a form of asexual reproduction using stolons, which are horizontal stems that spread across the ground, potentially forming new plants when they take root.

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    Description

    Explore the fascinating world of plant reproduction with this quiz. Understand how plants reproduce through spores and the concept of alternation of generations. Discover the unique characteristics of various plants, like the kangaroo fern, and their life cycles.

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