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Questions and Answers
What is the purpose of pollination in flowering plants?
What is the purpose of pollination in flowering plants?
Where does the zygote develop after pollination in flowering plants?
Where does the zygote develop after pollination in flowering plants?
What is the primary role of seeds in angiosperms?
What is the primary role of seeds in angiosperms?
When does the zygote typically split in flowering plants?
When does the zygote typically split in flowering plants?
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Which agents are involved in transferring pollen grains in plants?
Which agents are involved in transferring pollen grains in plants?
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What is the primary function of flowers in plants?
What is the primary function of flowers in plants?
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Which part of a flower consists of the male reproductive structures?
Which part of a flower consists of the male reproductive structures?
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How are flowers classified based on their reproductive structures?
How are flowers classified based on their reproductive structures?
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What is the role of the gynoecium in a flower?
What is the role of the gynoecium in a flower?
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Which process involves the differentiation and development of male and female reproductive structures in flowers?
Which process involves the differentiation and development of male and female reproductive structures in flowers?
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Study Notes
Sexual Reproduction in Flowering Plants
Stages of Sexual Reproduction
- Three stages of sexual reproduction in flowering plants: pollination, formation of a zygote, and formation of fruits and seeds
Pollination
- Transfer of pollen grains from anther to stigma of the same or different plant for fertilization and seed production
- Agents involved in pollination: birds, wind, animals, and water
Formation of a Zygote
- After pollination, male gamete is transferred down the style of the pistil to the ovary
- Male gamete fuses with female gamete to form a zygote near the embryo sac at the micropylar end
- Zygote splits only after some endosperm is formed, ensuring nutrition for the developing embryo
Formation of Fruits and Seeds
- After zygote formation, it develops into an embryo
- Ovules develop into seeds, and the ovary develops into a fruit
- Seeds are advantageous structures for reproduction, typically formed within fruits
Reproductive Structures in Flowers
- Complete flower consists of androecium (male reproductive structure) and gynoecium (female reproductive structure)
- Androecium consists of stamen, microsporangium, and pollen grain
- Gynoecium consists of pistil, megasporangium, and embryo sac
Types of Flowers
- Flowers can be classified as unisexual (having either stamen or pistil) or bisexual (having both) based on the presence of reproductive structures
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Description
Learn about sexual reproduction in flowering plants according to the CBSE Class 12 syllabus for 2023-24. Understand the importance of flowers in the process of sexual reproduction in plants. Explore the components of a complete flower and its role in plant reproduction.
