Sexual reproduction in flowering plant
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In this ppt we will cover the basic definition of flower, parts of flower, pollination, fertilization and function of flower.
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The lecture about plant parts and reproduction
The document discusses the parts and functions of flowers, as well as the process of pollination and reproduction in plants. It describes the male and female reproductive organs in flowers - stamens which produce pollen, and carpels which contain the ovules. Pollination occurs when pollen is transferred, usually by pollinators like bees and butterflies, from the anthers to the stigma of the same or another flower. This allows for fertilization and the development of seeds and fruits, allowing plants to reproduce. The document also discusses the types of pollination - cross pollination between different plants versus self pollination within the same plant.
Parts of flower
The document discusses the different parts of a flower, including the sepals, petals, androecium, and gynoecium. The sepals form the outermost whorl and are green in color. The petals are brightly colored to attract insects for pollination. The androecium is the male part of the flower and contains stamens. The gynoecium is the female part and contains carpels, which have three parts - the stigma, style, and ovary.
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The document provides information about flower parts and types of flowers. It discusses that a flower has four main parts: calyx, corolla, androecium, and gynoecium. It defines each part and their function. The document also describes the different types of flowers such as perfect versus imperfect, complete versus incomplete, monoecious versus dioecious, protandry versus protogamy, homostyle versus heterostyle. It concludes with definitions of sterile and natural flowers.
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This document provides information about flower parts and their functions. It defines a flower as the seed-bearing part of a plant consisting of reproductive organs surrounded by petals and sepals. The main parts of a complete flower are identified as: sepals, petals, stamens, and pistil. Each part is then defined, with sepals described as the outer green leaves that protect the inner parts, petals attracting insects for pollination, stamens producing pollen, and the pistil composed of an ovary, style and stigma where fertilization occurs.
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The document discusses the different parts of a flower including the petals, sepals, stamens, and pistil. It provides descriptions of each part and their functions. The petals together form the corolla and surround the reproductive parts of flowers. Sepals form the outermost part of the flower and protect the bud. Stamens are the male pollen-producing part of flowers. The pistil is usually called the female part and may contain one or more carpels consisting of an ovary, stigma, and sometimes a style. Each part is then observed under a digital microscope.
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- It involves the propagation of plants from vegetative plant parts like stems, leaves, roots etc without formation of seeds or spores.
- New individuals are formed without fusion of gametes.
- Common methods include runners/stolons (strawberry), suckers (potato), bulbs/corms/tubers (onion, ginger), cuttings (money plant).
- The new individuals formed are clones that are genetically identical to the parent plant.
- It allows for rapid multiplication of plants without reliance on seeds or flowers.
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Parts of a flower
The document summarizes the parts of a flower and their roles in reproduction. It explains that flowers contain reproductive organs and are made up of four main parts: sepals, petals, stamens, and pistils. The sepals protect the bud, petals attract pollinators, stamens produce pollen as the male part, and pistils receive pollen and contain ovaries to produce seeds as the female part. Pollination occurs through pollen transfer from the stamen to the pistil by wind, insects, or other animals. Fertilization happens when pollen grains fuse with egg cells in the ovary, developing into seeds and eventually fruit to protect and disperse the seeds.
Anatomy of Flowers
This document defines and describes the typical parts of a flower including the pedicel, receptacle, sepal, calyx, petal, corolla, pistil, stamen, anther, filament, style, stigma and ovary. It also discusses the classification of flowers based on presence or absence of floral parts, size and shape of parts, symmetry, and position of the ovary. Complete flowers have all four parts - sepal, petal, stamen and pistil - while incomplete flowers lack one or more. Perfect flowers have both stamen and pistil, imperfect have only one.
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Parts of flower
The document discusses the different parts of a flower, including the sepals, petals, androecium, and gynoecium. The sepals form the outermost whorl and are green in color. The petals are brightly colored to attract insects for pollination. The androecium is the male part of the flower and contains stamens. The gynoecium is the female part and contains carpels, which have three parts - the stigma, style, and ovary.
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The document provides information about flower parts and types of flowers. It discusses that a flower has four main parts: calyx, corolla, androecium, and gynoecium. It defines each part and their function. The document also describes the different types of flowers such as perfect versus imperfect, complete versus incomplete, monoecious versus dioecious, protandry versus protogamy, homostyle versus heterostyle. It concludes with definitions of sterile and natural flowers.
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This document provides information about flower parts and their functions. It defines a flower as the seed-bearing part of a plant consisting of reproductive organs surrounded by petals and sepals. The main parts of a complete flower are identified as: sepals, petals, stamens, and pistil. Each part is then defined, with sepals described as the outer green leaves that protect the inner parts, petals attracting insects for pollination, stamens producing pollen, and the pistil composed of an ovary, style and stigma where fertilization occurs.
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The document discusses the different parts of a flower including the petals, sepals, stamens, and pistil. It provides descriptions of each part and their functions. The petals together form the corolla and surround the reproductive parts of flowers. Sepals form the outermost part of the flower and protect the bud. Stamens are the male pollen-producing part of flowers. The pistil is usually called the female part and may contain one or more carpels consisting of an ovary, stigma, and sometimes a style. Each part is then observed under a digital microscope.
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Here are the key points about vegetative reproduction:
- It involves the propagation of plants from vegetative plant parts like stems, leaves, roots etc without formation of seeds or spores.
- New individuals are formed without fusion of gametes.
- Common methods include runners/stolons (strawberry), suckers (potato), bulbs/corms/tubers (onion, ginger), cuttings (money plant).
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- It allows for rapid multiplication of plants without reliance on seeds or flowers.
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The document summarizes the parts of a flower and their roles in reproduction. It explains that flowers contain reproductive organs and are made up of four main parts: sepals, petals, stamens, and pistils. The sepals protect the bud, petals attract pollinators, stamens produce pollen as the male part, and pistils receive pollen and contain ovaries to produce seeds as the female part. Pollination occurs through pollen transfer from the stamen to the pistil by wind, insects, or other animals. Fertilization happens when pollen grains fuse with egg cells in the ovary, developing into seeds and eventually fruit to protect and disperse the seeds.
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This document defines and describes the typical parts of a flower including the pedicel, receptacle, sepal, calyx, petal, corolla, pistil, stamen, anther, filament, style, stigma and ovary. It also discusses the classification of flowers based on presence or absence of floral parts, size and shape of parts, symmetry, and position of the ovary. Complete flowers have all four parts - sepal, petal, stamen and pistil - while incomplete flowers lack one or more. Perfect flowers have both stamen and pistil, imperfect have only one.
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Plants produce flowers which have male and female organs. The male organ, or stamen, contains pollen. The female organ, or carpel, contains the stigma, style and ovary. Seeds are formed when pollen from the stamen fertilizes the carpel. Flowers have specific parts - the stigma receives pollen, the style supports the stigma, the ovary holds the ovules that become seeds, the anther produces pollen, and the filament supports the anther.
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Flowers have reproductive organs called pistils and stamens. Pistils are the female organs and stamens are the male organs. Flowers can be classified based on their parts, symmetry, sex, composition, and inflorescence. Pollination is the transfer of pollen from the anthers to the stigma and can be cross-pollination between plants or self-pollination within a plant. Common agents of pollination include wind, water, insects, mammals, and birds.
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The document describes the different parts of a flower, including the sepals, petals, stamen, and pistil. It provides details on each part, such as the sepals protecting the bud and the petals attracting pollinators. The stamen are the male reproductive organs that produce pollen, while the pistil is the female reproductive organ containing the ovules. The document includes diagrams labeling the parts of the stamen and pistil. It concludes with a quiz to test the reader's understanding of flower anatomy.
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POLLINATION
Flowers have male and female parts that work together through pollination to produce seeds. The male part, called the stamen, produces pollen in structures called anthers. The female parts, called carpels, are made up of stigmas that catch pollen, styles, and ovaries where eggs are stored. Pollination occurs when pollen is transferred, usually by insects or wind, from the anther to the stigma, allowing the pollen tube to grow down to the ovaries and fertilize eggs, forming seeds.
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Plants produce flowers which have male and female organs. The male organ, or stamen, contains pollen. The female organ, or carpel, contains the stigma, style and ovary. Seeds are formed when pollen from the stamen fertilizes the carpel. Flowers have specific parts - the stigma receives pollen, the style supports the stigma, the ovary holds the ovules that become seeds, the anther produces pollen, and the filament supports the anther.
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Flowers have male and female parts. The male part, called the stamen, produces pollen in structures called anthers. The female part, called the carpel, is made up of a sticky stigma that catches pollen and ovaries where eggs are produced. Pollination occurs when pollen grains are transferred between flowers, such as by insects carrying pollen that brushes off on one flower and sticks to the stigma of another, allowing the pollen tube to grow and fertilize an egg in the ovary.
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Plants produce flowers which have male and female organs. The male organ, or stamen, contains pollen. The female organ, or carpel, contains the stigma, style and ovary. Seeds are formed when pollen from the stamen fertilizes the carpel. Flowers have specific parts - the stigma receives pollen, the style supports the stigma, the ovary holds the ovules that become seeds, the anther produces pollen, and the filament supports the anther.
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Flowers have male and female parts. The male part, called the stamen, produces pollen in structures called anthers. The female part, called the carpel, is made up of a sticky stigma that catches pollen and ovaries where eggs are produced. Pollination occurs when pollen grains are transferred between flowers, such as by insects carrying pollen that brushes off on one flower and sticks to the stigma of another, allowing the pollen tube to grow and fertilize an egg in the ovary.
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The key structures in a flower include the stigma, anther, style, ovary, and ovule. The stages of pollination begin when a pollen grain lands on the stigma and stimulates the formation of a pollen tube. The pollen tube grows down the style and carries the pollen grain nucleus and two male gametes. It continues growing until it reaches the micropyle opening of the ovary, where the male gametes are released. One male gamete fuses with the female gamete to form a zygote, while the other fuses with the diploid nucleus to form triploid endosperm.
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Flowers have male and female reproductive parts. The male parts are the anther and filament, while the female parts are the stigma, style, and ovary. Pollination is the transfer of pollen grains from the anther to the stigma, aided by animals, wind, or other mechanisms. Each pollen grain contains two male sex cells that travel through the pollen tube to fertilize the female sex cell in the ovule. After fertilization, the ovule develops into a seed and the ovary into a fruit. Seeds are then dispersed by wind, water, animals or splitting open. Germination occurs when a seed with sufficient water, air and warmth sprouts a root.
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The document describes the parts of a flower, including both the vegetative and reproductive structures. It explains that the vegetative parts are the petals, which attract pollinators, and the sepals, which protect the bud. The reproductive parts are the stamens, which produce pollen in structures called anthers, and the pistil, which consists of the stigma, style, and ovary. The ovary contains ovules, where fertilization occurs and seeds develop if pollination is successful. It provides an example of the floral structure of maize, describing its male and female inflorescences.
Unit 22 Plant Lifecycles
1. Plant life cycles alternate between a sporophyte phase and gametophyte phase through the process of meiosis and fertilization.
2. The sporophyte phase produces spores via meiosis while the gametophyte phase produces gametes via mitosis which can fuse during fertilization.
3. In seed plants, the sporophyte is the dominant phase seen as trees and flowers, which produce male pollen and female ovules that undergo double fertilization to form seeds.
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Sexual reproduction in flowering plant
- 1. Sexual Reproduction in flowering plants HIMSHIKHKA SINGH INTEGRATED B.SC-B.ED
- 2. FLOWER A flower, sometimes known as a bloom or blossom, is the reproductive structure found in flowering plants. The biological function of a flower is to facilitate reproduction, usually by providing a mechanism for the union of sperm with eggs.
- 6. Vegetative Parts of a Flower The vegetative part of a flower consists of the following: Petals: This is a bright-coloured part that attracts bees, insects, and birds. Colour of petals varies from plant to plant; some are bright while some are pale coloured. Thus, petals help us to differentiate one flower from another. Sepals: Sepal is the green-coloured part beneath the petals to protect rising buds. Some flowers have fused petals-sepals while a few have separated petals-sepals.
- 7. REPRODUCTIVE PART OF FLOWER
- 10. There are two reproductive parts of the flower – Stamen: male reproductive part and have two parts 1.filament. The filament is a slender, threadlike object, which functions by supporting the anther 2.Anther. The anther is a yellowish, sac-like structure, involved in producing and storing the pollens. .
- 11. Pistil: female reproductive part and divided into- Stigma: It is the topmost part or receptive tip of carpels in the gynoecium of a flower. Style: It is the long tube-like slender stalk that connects stigma and the ovary. Ovary: It is the ductless reproductive gland that holds a lot of ovules. It is the part of the plant where the seed formation takes place.
- 12. Pollination Pollination is the process in which the pollens are transferred from anther to stigma. The process of pollination can occur through a different medium
- 13. Fertilization occurs when pollen grains are carried by the wind to the open end of an ovule, which contains the eggs, or female gametophyte. There, the pollen grain develops an outgrowth called a pollen tube, which eventually penetrates to the egg cell
- 14. Functions Of Flower 1.Gametophytes develop in the flowers. 2.The flowers can produce diaspores without fertilization. 3.After fertilization, the ovary of the flower develops into a fruit containing a seed. 4.The most important function of flowers is reproduction. They help in the union of male and female gametes. 5.Flowers provide nectar to certain birds and insects, which in turn help in the transfer of pollen from one flower to the other. 6.Flowers may promote selfing, i.e., the union of sperms and eggs from the same flower, or cross-fertilization, i.e., the union of sperms and eggs from different flowers