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PPT: Sexual Reproduction in Flowering Plants
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Page 1 Sexual Reproduction in Flowering Plants Class-12 Page 2 Sexual Reproduction in Flowering Plants Class-12 All flowering plants (angiosperms) show sexual reproduction. Flowers are the sites of sexual reproduction. Sexual Reproduction in Flowering Plants Page 3 Sexual Reproduction in Flowering Plants Class-12 All flowering plants (angiosperms) show sexual reproduction. Flowers are the sites of sexual reproduction. Sexual Reproduction in Flowering Plants Pre-fertilization: Structures & Events Hormonal and structural changes lead to floral primordium differentiation. Inflorescences bear floral buds and ultimately flowers. In the flower the male and female reproductive structures, the androecium and the gynoecium differentiate and develop. Page 4 Sexual Reproduction in Flowering Plants Class-12 All flowering plants (angiosperms) show sexual reproduction. Flowers are the sites of sexual reproduction. Sexual Reproduction in Flowering Plants Pre-fertilization: Structures & Events Hormonal and structural changes lead to floral primordium differentiation. Inflorescences bear floral buds and ultimately flowers. In the flower the male and female reproductive structures, the androecium and the gynoecium differentiate and develop. Androecium: The Male Reproductive Part It is the male reproductive part of the flower. It consists of a whorl of stamens. Their number and length are variable in different species. Page 5 Sexual Reproduction in Flowering Plants Class-12 All flowering plants (angiosperms) show sexual reproduction. Flowers are the sites of sexual reproduction. Sexual Reproduction in Flowering Plants Pre-fertilization: Structures & Events Hormonal and structural changes lead to floral primordium differentiation. Inflorescences bear floral buds and ultimately flowers. In the flower the male and female reproductive structures, the androecium and the gynoecium differentiate and develop. Androecium: The Male Reproductive Part It is the male reproductive part of the flower. It consists of a whorl of stamens. Their number and length are variable in different species. Filament Anther Parts of stamenRead More
FAQs on PPT: Sexual Reproduction in Flowering Plants
| 1. What are the main parts of a flower and what's their role in sexual reproduction? |  |
Ans. A flower's reproductive structures include the stamen (male organ producing pollen) and pistil (female organ containing the ovule). The anther releases pollen grains, while the stigma receives them during pollination. Sepals and petals support pollination by attracting pollinators. Together, these floral parts enable the complete sexual reproduction cycle in flowering plants, from pollination through fertilisation to seed formation.
| 2. How does pollination actually happen between flowers and what's the difference between self and cross-pollination? | |
Ans. Pollination is the transfer of pollen from anther to stigma. Self-pollination occurs within the same flower or plant, while cross-pollination involves pollen transfer between different plants. Cross-pollination increases genetic diversity and produces healthier offspring, whereas self-pollination maintains genetic uniformity. Insects, wind, and water facilitate cross-pollination in flowering plants, making it essential for natural plant variation and adaptation.
| 3. What exactly happens during double fertilisation in angiosperms and why is it important for NEET? | |
Ans. Double fertilisation is the fusion of two sperm cells with the egg and polar nuclei simultaneously. One sperm fertilises the egg to form the embryo (2n), while the other fuses with polar nuclei to form endosperm (3n), which nourishes the developing embryo. This unique angiosperm feature ensures efficient seed development and is a critical NEET topic because it distinguishes flowering plants and appears frequently in competitive exams.
| 4. Why do some plants need pollinators like bees and butterflies while others rely on wind pollination? | |
Ans. Wind-pollinated flowers produce abundant, lightweight pollen and have exposed stamens and stigmas to catch airborne grains. Insect-pollinated flowers attract pollinators through bright colours, fragrance, and nectar rewards, producing sticky, heavy pollen. Insect pollination is more precise and energy-efficient, while wind pollination is wasteful but doesn't depend on pollinator availability. Plant structure and pollination strategy coevolve based on reproductive efficiency and environmental factors.
| 5. What happens to the ovule after fertilisation and how does it transform into a seed? | |
Ans. After fertilisation, the ovule develops into a seed through transformation of its tissues. The integuments harden into the seed coat for protection, the nucellus provides storage tissue, and the endosperm (formed from double fertilisation) becomes the nutritive tissue. The fertilised ovule's embryo develops into the plant embryo within the seed. This complete developmental process ensures the seed can survive dormancy and germinate into a new flowering plant when conditions are favourable.
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Document Description: PPT: Sexual Reproduction in Flowering Plants for NEET 2026 is part of Biology Class 12 preparation. The notes and questions for PPT: Sexual Reproduction in Flowering Plants have been prepared according to the NEET exam syllabus. Information about PPT: Sexual Reproduction in Flowering Plants covers topics like and PPT: Sexual Reproduction in Flowering Plants Example, for NEET 2026 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for PPT: Sexual Reproduction in Flowering Plants.
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