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CLASS 5 REPRODUCTION IN PLANTS
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CLASS 5 REPRODUCTION IN PLANTS

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@Dr. K. Viswanath

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Questions and Answers

What are the components of the male reproductive part of a flower?

  • Pollen, ovules
  • Stamen, calyx
  • Style, stigma, ovary
  • Filament, anther (correct)

    • Which type of pollination occurs in plants that have both male and female reproductive parts?

  • Self pollination (correct)
  • Cross pollination
  • Water pollination
  • Wind pollination

    • What is the final outcome after fertilization occurs in a flower?

  • The ovary enlarges and becomes a fruit (correct)
  • The stigma grows into a flower
  • The ovary becomes a leaf
  • The ovule becomes a pollen grain

    • Which flower type typically reproduces through cross pollination?

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

    Which of the following plants reproduces vegetatively through its roots?

    <p>Sweet Potato</p> Signup and view all the answers

    What is the primary role of the seed coat?

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

    Which type of seed contains only one cotyledon?

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

    What is essential for the germination of seeds?

    <p>Water and oxygen</p> Signup and view all the answers

    What is the process called when a seed is moved from one location to another?

    <p>Seed dispersal</p> Signup and view all the answers

    Which of the following does NOT usually aid in seed dispersal?

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

    What do the brightly colored petals of a flower represent?

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

    Which of the following is primarily responsible for transferring pollen in pollination?

    <p>Pollinating agents</p> Signup and view all the answers

    What is the role of endosperm in a seed?

    <p>To store and supply food</p> Signup and view all the answers

    The male reproductive part of a flower is called ______.

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

    The process by which pollen grains fuse with the ovules is called ______.

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

    Plants that reproduce by using their own parts such as roots, stems, and leaves are undergoing ______ reproduction.

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

    Cross pollination occurs in plants that have only one reproductive organ, either ______ or pistil.

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

    The ovary contains ______, which develop into seeds after fertilisation.

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

    The young baby plant inside a seed is called the ______.

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

    The ______ protects the embryo from external harm.

    <p>seed coat</p> Signup and view all the answers

    Seeds with two cotyledons are known as ______.

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

    Seeds require ______, oxygen, and appropriate temperature to germinate.

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

    The process of moving seeds from one place to another is called seed ______.

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

    Agents of dispersal include wind, water, birds, and ______.

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

    Pollination involves transferring pollen grains from the anther to the ______.

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

    The group of brightly colored petals in a flower is called the ______.

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

    The pistil is the male reproductive part of a flower.

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

    Self pollination occurs in plants that have only one reproductive organ.

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

    Insects assist with cross pollination for plants like jasmine and strawberry.

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

    Vegetative reproduction can occur through leaves, roots, and stems.

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

    The fusion of pollen grains with the ovules is called fertilisation.

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

    The embryo inside a seed develops into a young baby plant.

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

    Dandelion seeds are primarily dispersed by water.

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

    Seeds that have two cotyledons are referred to as monocotyledons.

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

    Seed dispersal helps avoid competition for resources among plants.

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

    Endosperm in a seed serves as a source of protection for the embryo.

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

    Plants can reproduce through both flowers and other parts of their body.

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

    All seeds require sunlight to germinate effectively.

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

    Pollination can occur through various agents such as insects, wind, and plants themselves.

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

    What is the primary difference between self-pollination and cross-pollination?

    <p>Self-pollination occurs in plants that have both reproductive parts, while cross-pollination occurs in plants that have only one reproductive organ.</p> Signup and view all the answers

    Describe the role of the ovary in a flower after fertilization.

    <p>After fertilization, the ovary enlarges and develops into a fruit, while the fertilized ovule develops into a seed.</p> Signup and view all the answers

    Explain how vegetative reproduction occurs in plants.

    <p>Vegetative reproduction involves plants reproducing from their own parts, such as roots, stems, and leaves, rather than through seeds.</p> Signup and view all the answers

    What types of pollination are facilitated by wind and insects respectively?

    <p>Wind facilitates cross-pollination in plants like palm and maize, while insects assist with cross-pollination in plants like jasmine and strawberry.</p> Signup and view all the answers

    Identify plants known for vegetative reproduction through their stems.

    <p>Garlic, potato, and ginger are examples of plants that reproduce vegetatively through their stems.</p> Signup and view all the answers

    What is the main purpose of seed dispersal in plants?

    <p>The main purpose of seed dispersal is to ensure the continuity and survival of species while avoiding overcrowding and competition for resources.</p> Signup and view all the answers

    How does the endosperm benefit the embryo during germination?

    <p>The endosperm provides stored food that sustains the embryo as it develops into a new plant.</p> Signup and view all the answers

    Describe the role of the micropyle in a seed.

    <p>The micropyle is the small opening in a seed through which water enters, facilitating the germination process.</p> Signup and view all the answers

    What are the two main types of seed based on cotyledons, and provide an example of each?

    <p>The two main types of seeds are monocotyledons (monocots), such as rice, and dicotyledons (dicots), such as gram seeds.</p> Signup and view all the answers

    Name two agents of seed dispersal and give an example of a plant for each.

    <p>Two agents of seed dispersal are wind, exemplified by dandelion seeds, and animals, exemplified by blackberry seeds.</p> Signup and view all the answers

    Explain how temperature affects the germination of seeds.

    <p>Lower temperatures can prolong the germination period of seeds, as they require warmth to activate their growth processes.</p> Signup and view all the answers

    What is pollination and who are its primary agents?

    <p>Pollination is the transfer of pollen grains from the anther to the stigma, primarily facilitated by insects, birds, and wind.</p> Signup and view all the answers

    What does the corolla do in the structure of a flower?

    <p>The corolla, made up of brightly colored petals, attracts pollinators such as insects to aid in reproduction.</p> Signup and view all the answers

    Study Notes

    Seed Structure

    • Seeds contain an embryo, the young plant protected by a hard, waterproof seed coat.
    • The endosperm serves as a food source for the embryo.
    • The micropyle is a small opening through which water enters the seed.

    Types of Seeds

    • Seeds are classified into two categories based on cotyledons:
      • Monocotyledons (monocots) have one cotyledon; examples include rice, wheat, and maize.
      • Dicotyledons (dicots) have two cotyledons; examples include gram, rajma, and pea seeds.

    Germination Process

    • Germination requires suitable conditions, including air, water, and sunlight.
    • Essential factors for germination include water, oxygen, and warm temperatures; some seeds also require sunlight.
    • Lower temperatures can delay germination.

    Seed Dispersal

    • Seed dispersal is essential for species continuity, preventing overcrowding, and avoiding competition for resources.
    • Different agents of dispersal include wind, water, birds, animals, and insects.
    • Examples of seed dispersals:
      • Wind: Dandelion and milkweed (light seeds).
      • Animals: Begger-ticks and blackberry.
      • Water: Lotus and coconut.
      • Humans: Beans and cherries.

    Methods of Plant Reproduction

    • Plants reproduce by:
      • Flowers: The primary method involving pollination, where pollen grains transfer from anther to stigma.
      • Vegetative Parts: Involves reproduction through leaves, stems, and roots.

    Pollination

    • Pollinating agents include insects, birds, animals, water, wind, and sometimes other plants.
    • Flowers are considered the reproductive organs, consisting of distinct parts:
      • Corolla: Brightly colored petals attract pollinators.
      • Calyx: Protective green sepals surrounding the flower bud.
      • Stamen: Male part, consisting of filament and anther, which contains pollen.
      • Pistil: Female part, made up of style, stigma, and ovary (containing ovules).

    Reproductive Organ Occurrence

    • Some flowers have both male and female parts, while others only have one.
    • Examples:
      • Unisexual: Flowers of papaya, cucumber, and pumpkin.
      • Bisexual: Flowers of hibiscus, mustard, and lily.

    Pollination Types

    • Self-pollination occurs in plants with both reproductive organs, e.g., wheat, tobacco, and pea plants.
    • Cross-pollination occurs in plants with only one organ, e.g., apples, grapes, and tulips.
      • Insect-pollinated: Jasmine, strawberry, mustard.
      • Wind-pollinated: Palm and maize.
      • Water-pollinated: Hydrilla and lotus.

    Fertilisation and Fruit Development

    • After pollination, pollen grains reach the stigma and ovary, leading to fertilization, which fuses pollen with ovules.
    • The ovary enlarges to become fruit, while fertilized ovules develop into seeds.

    Vegetative Reproduction

    • Some plants reproduce from parts such as:
      • Leaves: Bryophyllum and Begonia.
      • Roots: Dahlia and sweet potato.
      • Stems: Garlic, potato, and ginger.

    Seed Structure

    • Seeds contain an embryo, the young plant protected by a hard, waterproof seed coat.
    • The endosperm serves as a food source for the embryo.
    • The micropyle is a small opening through which water enters the seed.

    Types of Seeds

    • Seeds are classified into two categories based on cotyledons:
      • Monocotyledons (monocots) have one cotyledon; examples include rice, wheat, and maize.
      • Dicotyledons (dicots) have two cotyledons; examples include gram, rajma, and pea seeds.

    Germination Process

    • Germination requires suitable conditions, including air, water, and sunlight.
    • Essential factors for germination include water, oxygen, and warm temperatures; some seeds also require sunlight.
    • Lower temperatures can delay germination.

    Seed Dispersal

    • Seed dispersal is essential for species continuity, preventing overcrowding, and avoiding competition for resources.
    • Different agents of dispersal include wind, water, birds, animals, and insects.
    • Examples of seed dispersals:
      • Wind: Dandelion and milkweed (light seeds).
      • Animals: Begger-ticks and blackberry.
      • Water: Lotus and coconut.
      • Humans: Beans and cherries.

    Methods of Plant Reproduction

    • Plants reproduce by:
      • Flowers: The primary method involving pollination, where pollen grains transfer from anther to stigma.
      • Vegetative Parts: Involves reproduction through leaves, stems, and roots.

    Pollination

    • Pollinating agents include insects, birds, animals, water, wind, and sometimes other plants.
    • Flowers are considered the reproductive organs, consisting of distinct parts:
      • Corolla: Brightly colored petals attract pollinators.
      • Calyx: Protective green sepals surrounding the flower bud.
      • Stamen: Male part, consisting of filament and anther, which contains pollen.
      • Pistil: Female part, made up of style, stigma, and ovary (containing ovules).

    Reproductive Organ Occurrence

    • Some flowers have both male and female parts, while others only have one.
    • Examples:
      • Unisexual: Flowers of papaya, cucumber, and pumpkin.
      • Bisexual: Flowers of hibiscus, mustard, and lily.

    Pollination Types

    • Self-pollination occurs in plants with both reproductive organs, e.g., wheat, tobacco, and pea plants.
    • Cross-pollination occurs in plants with only one organ, e.g., apples, grapes, and tulips.
      • Insect-pollinated: Jasmine, strawberry, mustard.
      • Wind-pollinated: Palm and maize.
      • Water-pollinated: Hydrilla and lotus.

    Fertilisation and Fruit Development

    • After pollination, pollen grains reach the stigma and ovary, leading to fertilization, which fuses pollen with ovules.
    • The ovary enlarges to become fruit, while fertilized ovules develop into seeds.

    Vegetative Reproduction

    • Some plants reproduce from parts such as:
      • Leaves: Bryophyllum and Begonia.
      • Roots: Dahlia and sweet potato.
      • Stems: Garlic, potato, and ginger.

    Seed Structure

    • Seeds contain an embryo, the young plant protected by a hard, waterproof seed coat.
    • The endosperm serves as a food source for the embryo.
    • The micropyle is a small opening through which water enters the seed.

    Types of Seeds

    • Seeds are classified into two categories based on cotyledons:
      • Monocotyledons (monocots) have one cotyledon; examples include rice, wheat, and maize.
      • Dicotyledons (dicots) have two cotyledons; examples include gram, rajma, and pea seeds.

    Germination Process

    • Germination requires suitable conditions, including air, water, and sunlight.
    • Essential factors for germination include water, oxygen, and warm temperatures; some seeds also require sunlight.
    • Lower temperatures can delay germination.

    Seed Dispersal

    • Seed dispersal is essential for species continuity, preventing overcrowding, and avoiding competition for resources.
    • Different agents of dispersal include wind, water, birds, animals, and insects.
    • Examples of seed dispersals:
      • Wind: Dandelion and milkweed (light seeds).
      • Animals: Begger-ticks and blackberry.
      • Water: Lotus and coconut.
      • Humans: Beans and cherries.

    Methods of Plant Reproduction

    • Plants reproduce by:
      • Flowers: The primary method involving pollination, where pollen grains transfer from anther to stigma.
      • Vegetative Parts: Involves reproduction through leaves, stems, and roots.

    Pollination

    • Pollinating agents include insects, birds, animals, water, wind, and sometimes other plants.
    • Flowers are considered the reproductive organs, consisting of distinct parts:
      • Corolla: Brightly colored petals attract pollinators.
      • Calyx: Protective green sepals surrounding the flower bud.
      • Stamen: Male part, consisting of filament and anther, which contains pollen.
      • Pistil: Female part, made up of style, stigma, and ovary (containing ovules).

    Reproductive Organ Occurrence

    • Some flowers have both male and female parts, while others only have one.
    • Examples:
      • Unisexual: Flowers of papaya, cucumber, and pumpkin.
      • Bisexual: Flowers of hibiscus, mustard, and lily.

    Pollination Types

    • Self-pollination occurs in plants with both reproductive organs, e.g., wheat, tobacco, and pea plants.
    • Cross-pollination occurs in plants with only one organ, e.g., apples, grapes, and tulips.
      • Insect-pollinated: Jasmine, strawberry, mustard.
      • Wind-pollinated: Palm and maize.
      • Water-pollinated: Hydrilla and lotus.

    Fertilisation and Fruit Development

    • After pollination, pollen grains reach the stigma and ovary, leading to fertilization, which fuses pollen with ovules.
    • The ovary enlarges to become fruit, while fertilized ovules develop into seeds.

    Vegetative Reproduction

    • Some plants reproduce from parts such as:
      • Leaves: Bryophyllum and Begonia.
      • Roots: Dahlia and sweet potato.
      • Stems: Garlic, potato, and ginger.

    Seed Structure

    • Seeds contain an embryo, the young plant protected by a hard, waterproof seed coat.
    • The endosperm serves as a food source for the embryo.
    • The micropyle is a small opening through which water enters the seed.

    Types of Seeds

    • Seeds are classified into two categories based on cotyledons:
      • Monocotyledons (monocots) have one cotyledon; examples include rice, wheat, and maize.
      • Dicotyledons (dicots) have two cotyledons; examples include gram, rajma, and pea seeds.

    Germination Process

    • Germination requires suitable conditions, including air, water, and sunlight.
    • Essential factors for germination include water, oxygen, and warm temperatures; some seeds also require sunlight.
    • Lower temperatures can delay germination.

    Seed Dispersal

    • Seed dispersal is essential for species continuity, preventing overcrowding, and avoiding competition for resources.
    • Different agents of dispersal include wind, water, birds, animals, and insects.
    • Examples of seed dispersals:
      • Wind: Dandelion and milkweed (light seeds).
      • Animals: Begger-ticks and blackberry.
      • Water: Lotus and coconut.
      • Humans: Beans and cherries.

    Methods of Plant Reproduction

    • Plants reproduce by:
      • Flowers: The primary method involving pollination, where pollen grains transfer from anther to stigma.
      • Vegetative Parts: Involves reproduction through leaves, stems, and roots.

    Pollination

    • Pollinating agents include insects, birds, animals, water, wind, and sometimes other plants.
    • Flowers are considered the reproductive organs, consisting of distinct parts:
      • Corolla: Brightly colored petals attract pollinators.
      • Calyx: Protective green sepals surrounding the flower bud.
      • Stamen: Male part, consisting of filament and anther, which contains pollen.
      • Pistil: Female part, made up of style, stigma, and ovary (containing ovules).

    Reproductive Organ Occurrence

    • Some flowers have both male and female parts, while others only have one.
    • Examples:
      • Unisexual: Flowers of papaya, cucumber, and pumpkin.
      • Bisexual: Flowers of hibiscus, mustard, and lily.

    Pollination Types

    • Self-pollination occurs in plants with both reproductive organs, e.g., wheat, tobacco, and pea plants.
    • Cross-pollination occurs in plants with only one organ, e.g., apples, grapes, and tulips.
      • Insect-pollinated: Jasmine, strawberry, mustard.
      • Wind-pollinated: Palm and maize.
      • Water-pollinated: Hydrilla and lotus.

    Fertilisation and Fruit Development

    • After pollination, pollen grains reach the stigma and ovary, leading to fertilization, which fuses pollen with ovules.
    • The ovary enlarges to become fruit, while fertilized ovules develop into seeds.

    Vegetative Reproduction

    • Some plants reproduce from parts such as:
      • Leaves: Bryophyllum and Begonia.
      • Roots: Dahlia and sweet potato.
      • Stems: Garlic, potato, and ginger.

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    Description

    Test your knowledge on seed anatomy, including the functions of the embryo, seed coat, endosperm, and micropyle. Learn about the differences between monocotyledons and dicotyledons. This quiz covers essential concepts in plant biology.

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