4. Development of Embryo_2.pptx embryo beginning
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seed structure.pptx
A seed contains an embryo with a radicle and plumule, stored food materials, and a protective seed coat. Seeds come in many shapes and sizes, from dust-like orchid seeds to large double coconuts. The seed coat protects the embryo and acts as a barrier, regulating gas exchange and environmental cues to trigger germination. Within the seed coat is the embryo, consisting of a short axis connecting two cotyledons which store food and nourish the seedling initially. Seeds are categorized as endospermous if they contain persisting endosperm tissue, or non-endospermous if they lack endosperm.
“ Importance of seed, seed structure & function ”.pptx
The document discusses the importance and structure of seeds. Seeds are economically and biologically important as they contain reserves that help with early plant growth. Seeds allow for reproduction and dispersal of plants. Structurally, seeds typically contain a seed coat, endosperm, and embryo. The seed coat protects the embryo, the endosperm stores nutrients, and the embryo develops into a new plant. Key parts of the embryo include the radicle, hypocotyl, epicotyl, cotyledons, and plumule. Seeds play a vital role in plant reproduction and agriculture.
seed : structure, parts of a seed, types
The ovules after fertilization develops into seeds.
Consist of an embryo, with or without endosperm and a seed coat.
Found inside a fruit.
Plants like Pteridophytes and Bryophytes do not produce seeds.
Gymnosperms do not have ovaries and produce naked seeds.
Angiosperms produce seeds having protective seed coat, food reserves(endosperm) and embryo.
Seed structure and germination
The document discusses seed structure, the conditions required for germination including water, temperature, oxygen, and the two main types of germination - hypogeal where the cotyledons remain underground and epigeal where they are pushed above ground. It also describes seed structure and germination processes in various plants like peas, beans, and maize, as well as special types of germination like vivipary seen in mangrove plants.
Chapter 16 Reproduction in Plants Lesson 3 - Fertilization & post fertilizati...
The document summarizes the process of fertilization and germination in plants. It discusses how pollen grains germinate and the pollen tube grows to deliver sperm cells. Double fertilization occurs, where one sperm cell fertilizes the egg to form the embryo and the other fertilizes the central cell to form endosperm. Post-fertilization, the zygote develops into an embryo while endosperm divides to store food. Seeds then go through germination, where water and enzymes trigger growth of the root and shoot from the stored food reserves. Germination can be epigeal, where the cotyledons emerge above ground, or hypogeal, where they remain below.
Seed pdf
This document discusses seed structure, germination, and types of seeds. It covers:
- The external and internal structures of seeds like beans and corn, including protective seed coats, cotyledons for food storage, the radicle and plumule that form the root and shoot.
- Factors that influence germination like water, temperature, oxygen. Germination can be above ground (epigeal) or below ground (hypogeal).
- Different types of seeds including monocot and dicot, albuminous seeds with endosperm and exalbuminous seeds without. Some seeds like mangroves can germinate before detaching from the parent plant (viviparous germination
Seed stores
A seed is an embryonic plant enclosed in a protective outer covering. The formation of the seed is part of the process of reproduction in seed plants, the spermatophytes, including the gymnosperm and angiosperm plants.
Angiosperm (seed formation and development)
Daisy Capon is a PhD student studying crop science. Her research focuses on angiosperm seed formation and development. She outlines the key stages of male and female gametophyte development, including microsporogenesis, microgametogenesis, megasporogenesis, and megagametogenesis. She then discusses seed formation, including the roles of the integuments, nucellus, and embryo sac. The structures and development of plant embryos are also examined, from fertilization through the cotyledon, hypocotyl, and radicle stages. Finally, she analyzes the chemical composition of seeds and factors that affect it.
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seed structure.pptx
A seed contains an embryo with a radicle and plumule, stored food materials, and a protective seed coat. Seeds come in many shapes and sizes, from dust-like orchid seeds to large double coconuts. The seed coat protects the embryo and acts as a barrier, regulating gas exchange and environmental cues to trigger germination. Within the seed coat is the embryo, consisting of a short axis connecting two cotyledons which store food and nourish the seedling initially. Seeds are categorized as endospermous if they contain persisting endosperm tissue, or non-endospermous if they lack endosperm.
“ Importance of seed, seed structure & function ”.pptx
The document discusses the importance and structure of seeds. Seeds are economically and biologically important as they contain reserves that help with early plant growth. Seeds allow for reproduction and dispersal of plants. Structurally, seeds typically contain a seed coat, endosperm, and embryo. The seed coat protects the embryo, the endosperm stores nutrients, and the embryo develops into a new plant. Key parts of the embryo include the radicle, hypocotyl, epicotyl, cotyledons, and plumule. Seeds play a vital role in plant reproduction and agriculture.
seed : structure, parts of a seed, types
The ovules after fertilization develops into seeds.
Consist of an embryo, with or without endosperm and a seed coat.
Found inside a fruit.
Plants like Pteridophytes and Bryophytes do not produce seeds.
Gymnosperms do not have ovaries and produce naked seeds.
Angiosperms produce seeds having protective seed coat, food reserves(endosperm) and embryo.
Seed structure and germination
The document discusses seed structure, the conditions required for germination including water, temperature, oxygen, and the two main types of germination - hypogeal where the cotyledons remain underground and epigeal where they are pushed above ground. It also describes seed structure and germination processes in various plants like peas, beans, and maize, as well as special types of germination like vivipary seen in mangrove plants.
Chapter 16 Reproduction in Plants Lesson 3 - Fertilization & post fertilizati...
The document summarizes the process of fertilization and germination in plants. It discusses how pollen grains germinate and the pollen tube grows to deliver sperm cells. Double fertilization occurs, where one sperm cell fertilizes the egg to form the embryo and the other fertilizes the central cell to form endosperm. Post-fertilization, the zygote develops into an embryo while endosperm divides to store food. Seeds then go through germination, where water and enzymes trigger growth of the root and shoot from the stored food reserves. Germination can be epigeal, where the cotyledons emerge above ground, or hypogeal, where they remain below.
Seed pdf
This document discusses seed structure, germination, and types of seeds. It covers:
- The external and internal structures of seeds like beans and corn, including protective seed coats, cotyledons for food storage, the radicle and plumule that form the root and shoot.
- Factors that influence germination like water, temperature, oxygen. Germination can be above ground (epigeal) or below ground (hypogeal).
- Different types of seeds including monocot and dicot, albuminous seeds with endosperm and exalbuminous seeds without. Some seeds like mangroves can germinate before detaching from the parent plant (viviparous germination
Seed stores
A seed is an embryonic plant enclosed in a protective outer covering. The formation of the seed is part of the process of reproduction in seed plants, the spermatophytes, including the gymnosperm and angiosperm plants.
Angiosperm (seed formation and development)
Daisy Capon is a PhD student studying crop science. Her research focuses on angiosperm seed formation and development. She outlines the key stages of male and female gametophyte development, including microsporogenesis, microgametogenesis, megasporogenesis, and megagametogenesis. She then discusses seed formation, including the roles of the integuments, nucellus, and embryo sac. The structures and development of plant embryos are also examined, from fertilization through the cotyledon, hypocotyl, and radicle stages. Finally, she analyzes the chemical composition of seeds and factors that affect it.
Biology Lesson 3.4
1. Seeds contain an embryo which includes the plumule, radicle, hypocotyl, and one or two cotyledons that provide nutrients.
2. A seed also has a protective seed coat and may contain endosperm that stores additional food.
3. Germination occurs when a seed absorbs water, softens its coat, and the root and shoot emerge from the soil using energy from the cotyledons or endosperm. Factors like moisture, oxygen, temperature, and soil quality affect germination.
Morphology of Seeds.pptx
Seed is a mature ovule containing an embryonic plant, food stores, and a protective coat. There are two main types of seeds: monocotyledonous and dicotyledonous. Monocotyledonous seeds have one cotyledon, a single seed coat layer, bulky endosperm for food storage, a small embryo in an endosperm groove, and a shield-shaped scutellum cotyledon. Dicotyledonous seeds have two cotyledons, an outer seed coat with testa and tegmen layers, a hilum scar, micropyle pore, fleshy food-storing cotyledons, and an embryonal axis with radicle and plum
Endosperm development
Endosperm is a nutritive tissue found in seeds after fertilization that provides nutrients for embryo development. There are three main types of endosperm: nuclear, cellular, and helobial. The endosperm can either be absorbed during embryo development, leaving the seed endospermless, or persist as a storage tissue. In some plants the endosperm stores fats, while in grains like wheat and corn it mainly stores starches. Histologically, endosperm cells are isodiametric and fill with storage materials, while some plants have an aleurone layer that secretes enzymes to aid in seed germination.
Tissue culture
Plant tissue culture is a technique where plant cells, tissues, or organs are grown in an artificial nutrient medium under sterile conditions. Haberlandt in 1902 first attempted to culture plant tissues in vitro and is considered the father of plant tissue culture. Important milestones in the history of plant tissue culture include the development of MS medium by Murashige and Skoog in 1962 and the first transgenic plant created in 1983. Common types of plant tissue culture include callus culture, suspension culture, organ culture, and meristem culture. Tissue culture has many applications in crop improvement including micropropagation, breeding, and production of secondary metabolites.
seeds & fruit.ppt
HIGH SCHOOL TOPIC THAT DISCUSSES SEED IN PLANTS AND ITS TYPES.IT ALSO INCLUDES ACTIVITIES THE TEACHER CAN ENGAGE THE STUDENTS WITH THROUGH OUT THE LEARNING PROCESS. INTERACTIVE VIDEOS ARE ALSO INCLUDED AND SOME TAKE AWAY QUESTIONS AT THE END OF THE PRESENTATION. THE PRESENTATION ALSO DISCUSSES THE PARTS OF A SEED AND THEIR FUNCTIONS FOR C;LARITY TO THE LEARNERS.
Zafar Ali
1. The document describes the process of embryogenesis in eudicots and monocots.
2. In eudicots, embryogenesis begins with the zygote dividing into two cells, with further cell divisions forming a globular proembryo and then a heart stage as cotyledons develop. Later stages include a torpedo shape and then a mature embryo.
3. Embryogenesis in monocots is similar but does not include a heart stage since there is only one cotyledon, resulting in a cylindrical embryo proper instead.
SEED STRUCTURE.ppt
1. A seed is composed of three main structures - the seed coat, embryo, and nutrient storage tissue.
2. The seed coat protects the embryo and has two layers - the outer testa and inner tegmen. It has features like the hilum, micropyle, and raphe.
3. The embryo contains structures that will develop into the root, shoot, and leaves. It is made of a radicle, plumule, hypocotyl, epicotyl, and one or two cotyledons in monocots and dicots respectively.
4. The nutrient storage tissue is the endosperm or perisperm, which stores food for the developing embryo. Seeds
Post-Fertilization and Formation & Development of Seed and Fruit.pdf
This is a notes type content for the Maharashtra board 12th std students of subject biology. The content is the 3rd part of the 1st chapter namely "Reproduction in Lower and Higher Plants". For detail understanding the chapter and convenience or either simplicity I've separated out the chapter into three parts.
The 3rd part named as " Post-Fertilization and Formation & Development " which includes necessary items which are utmost for the board exams preparation. In this, the results from the reproduction of plants will be studying. The pictures and content I'd referred from the latest textbook of Maharashtra State board, old textbook, Internet, etc.
Std10 Ch12-Life-cycle
Sexual reproduction involves the fusion of two gametes - one male and one female. In plants, this occurs through pollination where pollen is transferred from the anther to the stigma, and fertilization where the pollen tube delivers sperm to fuse with the egg. This restores the chromosome number and produces offspring that are genetically different from the parents, allowing for beneficial variations that help species adapt and survive changing environments. Asexual reproduction only involves one parent and mitosis, resulting in genetically identical offspring but lacks variations. Both modes are important - sexual reproduction for variations and asexual for rapid reproduction.
Seed science and technology
1. The document discusses the evolution of seeds from early algal mats to complex angiosperms and gymnosperms.
2. It describes the key stages in seed development including pollination, fertilization, embryo and endosperm development, and seed coat formation.
3. Seed structure and function is explained for both monocotyledonous and dicotyledonous seeds, highlighting differences in embryo, endosperm, and food storage tissues between the two groups.
“ Seed and Fruit development and Seed and Fruit Abortion ”.pptx
Seed and fruit development involve complex processes including double fertilization, embryo and endosperm development, and fruit ripening. Seed abortion can occur due to failures in fertilization, endosperm, or embryo development. It reduces yields in many crops. Fruit abortion is influenced by environmental and genetic factors and plant hormones. It results from embryo or fruit abscission and diminishes wild blueberry yields despite high initial fruit set. Understanding the causes of seed and fruit abortion can help improve crop productivity and yields.
Ch. 38: Angiosperm Reproduction and Biotechnology
1) Flowers help angiosperms reproduce sexually through pollination which involves the transfer of pollen from the anther to the stigma.
2) Double fertilization occurs when two sperm fuse with the egg and central cells, producing a diploid zygote and triploid endosperm.
3) The zygote develops into an embryo within a seed, which is protected by a fruit. Common fruits include berries, pods, and nuts.
Synthetic seeds
Synthetic seeds are encapsulated somatic embryos or shoot buds that can be used for planting like traditional seeds. They allow for clonal propagation of plants that are difficult to reproduce through traditional seeds, including some fruit crops. The production of synthetic seeds involves inducing somatic embryogenesis in callus cultures, maturing the embryos, and encapsulating them in a protective gel before planting. This allows genetic material to be stored and dispersed while avoiding issues with seed-borne diseases, low seed viability, and difficulties reproducing species that lack traditional seeds.
Seeds fruits by pooja
1) Fruits develop from the ovary of a flower and contain seeds. The ovary wall becomes the fruit as the ovules inside fertilize and develop into seeds.
2) Fruits are categorized as either dry fruits like legumes and capsules, or fleshy fruits like drupes, pomes, and berries.
3) Seed dispersal methods depend on the type of fruit, such as wind for those with wings, water for floating fruits, and animals for fleshy fruits.
4) Seeds contain an embryo protected by a seed coat and stored food. They develop dormancy to ensure germination only under optimal conditions.
Seeds fruits by pooja
1) Fruits develop from the ovary of flowers after fertilization. The ovary wall becomes the fruit, protecting the developing seeds inside.
2) Fruits are categorized as either dry fruits like legumes and capsules, or fleshy fruits like drupes, pomes, and berries.
3) Seed dispersal methods depend on fruit type, such as wind for small dry fruits or animals for fleshy fruits.
4) Seeds contain an embryo protected by a seed coat. The embryo develops into a young plant, fueled by stored food in the cotyledon.
Pollen pistil interaction
The document discusses pollen-pistil interaction and development of seeds and fruits in angiosperms. It describes how the pollen tube grows through the pistil tissues towards the ovary after pollination. It explains that fertilization results in the ovule developing into a seed and the ovary developing into a fruit. The key stages of embryo and endosperm development are also summarized.
SCIENCE GRADE 5 - SEED.pptx
A seed contains an embryo plant and food stores. It protects the embryo with a seed coat until conditions allow germination. Germination begins when the seed absorbs water, causing the root and shoot to emerge from inside. There are two main types of germination - epigeal, where the shoot emerges above ground, and hypogeal, where it remains underground. Seeds come in many forms like fruits, vegetables, flowers and grains, and allow plants to disperse and regrow.
angiosperm reproduction and biotechnology
1) Angiosperm reproduction can occur sexually through flowers producing seeds or asexually through vegetative reproduction.
2) Flowers contain reproductive structures like stamens which produce pollen and carpels containing ovules. Pollen grains contain male gametophytes while ovules contain female gametophytes.
3) Fertilization occurs through double fertilization - one sperm fuses with the egg to form a zygote and another with polar nuclei to form endosperm, providing nutrition for the developing embryo.
How do organisms reproduce part 1 (Asexual Reproduction)
The document discusses various modes of reproduction in organisms. It explains that reproduction allows for the survival and increase of species by producing new individuals. It describes asexual reproduction methods like binary fission, budding, regeneration, fragmentation, and spore formation which involve a single parent. Sexual reproduction involves two parents. The document also discusses the importance of variation during reproduction for species survival and evolution.
Gymnosperm18 withgneto
Gymnosperms are seed plants that reproduce via naked seeds not enclosed in an ovary. There are five phyla of extant seed plants, four of which are gymnosperms. Coniferophyta, or conifers, is one of the gymnosperm phyla and includes trees like pines, hemlocks and redwoods. Conifers bear their naked seeds on modified leaves called sporophylls and have adapted traits like wood to support their large size, with some being among the largest and oldest living organisms.
More Related Content
Similar to 4. Development of Embryo_2.pptx embryo beginning
Biology Lesson 3.4
1. Seeds contain an embryo which includes the plumule, radicle, hypocotyl, and one or two cotyledons that provide nutrients.
2. A seed also has a protective seed coat and may contain endosperm that stores additional food.
3. Germination occurs when a seed absorbs water, softens its coat, and the root and shoot emerge from the soil using energy from the cotyledons or endosperm. Factors like moisture, oxygen, temperature, and soil quality affect germination.
Morphology of Seeds.pptx
Seed is a mature ovule containing an embryonic plant, food stores, and a protective coat. There are two main types of seeds: monocotyledonous and dicotyledonous. Monocotyledonous seeds have one cotyledon, a single seed coat layer, bulky endosperm for food storage, a small embryo in an endosperm groove, and a shield-shaped scutellum cotyledon. Dicotyledonous seeds have two cotyledons, an outer seed coat with testa and tegmen layers, a hilum scar, micropyle pore, fleshy food-storing cotyledons, and an embryonal axis with radicle and plum
Endosperm development
Endosperm is a nutritive tissue found in seeds after fertilization that provides nutrients for embryo development. There are three main types of endosperm: nuclear, cellular, and helobial. The endosperm can either be absorbed during embryo development, leaving the seed endospermless, or persist as a storage tissue. In some plants the endosperm stores fats, while in grains like wheat and corn it mainly stores starches. Histologically, endosperm cells are isodiametric and fill with storage materials, while some plants have an aleurone layer that secretes enzymes to aid in seed germination.
Tissue culture
Plant tissue culture is a technique where plant cells, tissues, or organs are grown in an artificial nutrient medium under sterile conditions. Haberlandt in 1902 first attempted to culture plant tissues in vitro and is considered the father of plant tissue culture. Important milestones in the history of plant tissue culture include the development of MS medium by Murashige and Skoog in 1962 and the first transgenic plant created in 1983. Common types of plant tissue culture include callus culture, suspension culture, organ culture, and meristem culture. Tissue culture has many applications in crop improvement including micropropagation, breeding, and production of secondary metabolites.
seeds & fruit.ppt
HIGH SCHOOL TOPIC THAT DISCUSSES SEED IN PLANTS AND ITS TYPES.IT ALSO INCLUDES ACTIVITIES THE TEACHER CAN ENGAGE THE STUDENTS WITH THROUGH OUT THE LEARNING PROCESS. INTERACTIVE VIDEOS ARE ALSO INCLUDED AND SOME TAKE AWAY QUESTIONS AT THE END OF THE PRESENTATION. THE PRESENTATION ALSO DISCUSSES THE PARTS OF A SEED AND THEIR FUNCTIONS FOR C;LARITY TO THE LEARNERS.
Zafar Ali
1. The document describes the process of embryogenesis in eudicots and monocots.
2. In eudicots, embryogenesis begins with the zygote dividing into two cells, with further cell divisions forming a globular proembryo and then a heart stage as cotyledons develop. Later stages include a torpedo shape and then a mature embryo.
3. Embryogenesis in monocots is similar but does not include a heart stage since there is only one cotyledon, resulting in a cylindrical embryo proper instead.
SEED STRUCTURE.ppt
1. A seed is composed of three main structures - the seed coat, embryo, and nutrient storage tissue.
2. The seed coat protects the embryo and has two layers - the outer testa and inner tegmen. It has features like the hilum, micropyle, and raphe.
3. The embryo contains structures that will develop into the root, shoot, and leaves. It is made of a radicle, plumule, hypocotyl, epicotyl, and one or two cotyledons in monocots and dicots respectively.
4. The nutrient storage tissue is the endosperm or perisperm, which stores food for the developing embryo. Seeds
Post-Fertilization and Formation & Development of Seed and Fruit.pdf
This is a notes type content for the Maharashtra board 12th std students of subject biology. The content is the 3rd part of the 1st chapter namely "Reproduction in Lower and Higher Plants". For detail understanding the chapter and convenience or either simplicity I've separated out the chapter into three parts.
The 3rd part named as " Post-Fertilization and Formation & Development " which includes necessary items which are utmost for the board exams preparation. In this, the results from the reproduction of plants will be studying. The pictures and content I'd referred from the latest textbook of Maharashtra State board, old textbook, Internet, etc.
Std10 Ch12-Life-cycle
Sexual reproduction involves the fusion of two gametes - one male and one female. In plants, this occurs through pollination where pollen is transferred from the anther to the stigma, and fertilization where the pollen tube delivers sperm to fuse with the egg. This restores the chromosome number and produces offspring that are genetically different from the parents, allowing for beneficial variations that help species adapt and survive changing environments. Asexual reproduction only involves one parent and mitosis, resulting in genetically identical offspring but lacks variations. Both modes are important - sexual reproduction for variations and asexual for rapid reproduction.
Seed science and technology
1. The document discusses the evolution of seeds from early algal mats to complex angiosperms and gymnosperms.
2. It describes the key stages in seed development including pollination, fertilization, embryo and endosperm development, and seed coat formation.
3. Seed structure and function is explained for both monocotyledonous and dicotyledonous seeds, highlighting differences in embryo, endosperm, and food storage tissues between the two groups.
“ Seed and Fruit development and Seed and Fruit Abortion ”.pptx
Seed and fruit development involve complex processes including double fertilization, embryo and endosperm development, and fruit ripening. Seed abortion can occur due to failures in fertilization, endosperm, or embryo development. It reduces yields in many crops. Fruit abortion is influenced by environmental and genetic factors and plant hormones. It results from embryo or fruit abscission and diminishes wild blueberry yields despite high initial fruit set. Understanding the causes of seed and fruit abortion can help improve crop productivity and yields.
Ch. 38: Angiosperm Reproduction and Biotechnology
1) Flowers help angiosperms reproduce sexually through pollination which involves the transfer of pollen from the anther to the stigma.
2) Double fertilization occurs when two sperm fuse with the egg and central cells, producing a diploid zygote and triploid endosperm.
3) The zygote develops into an embryo within a seed, which is protected by a fruit. Common fruits include berries, pods, and nuts.
Synthetic seeds
Synthetic seeds are encapsulated somatic embryos or shoot buds that can be used for planting like traditional seeds. They allow for clonal propagation of plants that are difficult to reproduce through traditional seeds, including some fruit crops. The production of synthetic seeds involves inducing somatic embryogenesis in callus cultures, maturing the embryos, and encapsulating them in a protective gel before planting. This allows genetic material to be stored and dispersed while avoiding issues with seed-borne diseases, low seed viability, and difficulties reproducing species that lack traditional seeds.
Seeds fruits by pooja
1) Fruits develop from the ovary of a flower and contain seeds. The ovary wall becomes the fruit as the ovules inside fertilize and develop into seeds.
2) Fruits are categorized as either dry fruits like legumes and capsules, or fleshy fruits like drupes, pomes, and berries.
3) Seed dispersal methods depend on the type of fruit, such as wind for those with wings, water for floating fruits, and animals for fleshy fruits.
4) Seeds contain an embryo protected by a seed coat and stored food. They develop dormancy to ensure germination only under optimal conditions.
Seeds fruits by pooja
1) Fruits develop from the ovary of flowers after fertilization. The ovary wall becomes the fruit, protecting the developing seeds inside.
2) Fruits are categorized as either dry fruits like legumes and capsules, or fleshy fruits like drupes, pomes, and berries.
3) Seed dispersal methods depend on fruit type, such as wind for small dry fruits or animals for fleshy fruits.
4) Seeds contain an embryo protected by a seed coat. The embryo develops into a young plant, fueled by stored food in the cotyledon.
Pollen pistil interaction
The document discusses pollen-pistil interaction and development of seeds and fruits in angiosperms. It describes how the pollen tube grows through the pistil tissues towards the ovary after pollination. It explains that fertilization results in the ovule developing into a seed and the ovary developing into a fruit. The key stages of embryo and endosperm development are also summarized.
SCIENCE GRADE 5 - SEED.pptx
A seed contains an embryo plant and food stores. It protects the embryo with a seed coat until conditions allow germination. Germination begins when the seed absorbs water, causing the root and shoot to emerge from inside. There are two main types of germination - epigeal, where the shoot emerges above ground, and hypogeal, where it remains underground. Seeds come in many forms like fruits, vegetables, flowers and grains, and allow plants to disperse and regrow.
angiosperm reproduction and biotechnology
1) Angiosperm reproduction can occur sexually through flowers producing seeds or asexually through vegetative reproduction.
2) Flowers contain reproductive structures like stamens which produce pollen and carpels containing ovules. Pollen grains contain male gametophytes while ovules contain female gametophytes.
3) Fertilization occurs through double fertilization - one sperm fuses with the egg to form a zygote and another with polar nuclei to form endosperm, providing nutrition for the developing embryo.
How do organisms reproduce part 1 (Asexual Reproduction)
The document discusses various modes of reproduction in organisms. It explains that reproduction allows for the survival and increase of species by producing new individuals. It describes asexual reproduction methods like binary fission, budding, regeneration, fragmentation, and spore formation which involve a single parent. Sexual reproduction involves two parents. The document also discusses the importance of variation during reproduction for species survival and evolution.
Gymnosperm18 withgneto
Gymnosperms are seed plants that reproduce via naked seeds not enclosed in an ovary. There are five phyla of extant seed plants, four of which are gymnosperms. Coniferophyta, or conifers, is one of the gymnosperm phyla and includes trees like pines, hemlocks and redwoods. Conifers bear their naked seeds on modified leaves called sporophylls and have adapted traits like wood to support their large size, with some being among the largest and oldest living organisms.
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Post-Fertilization and Formation & Development of Seed and Fruit.pdf
Post-Fertilization and Formation & Development of Seed and Fruit.pdf
“ Seed and Fruit development and Seed and Fruit Abortion ”.pptx
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How do organisms reproduce part 1 (Asexual Reproduction)
How do organisms reproduce part 1 (Asexual Reproduction)
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আমাদের সবার জন্য খুব খুব গুরুত্বপূর্ণ একটি বই ..বিসিএস, ব্যাংক, ইউনিভার্সিটি ভর্তি ও যে কোন প্রতিযোগিতা মূলক পরীক্ষার জন্য এর খুব ইম্পরট্যান্ট একটি বিষয় ...তাছাড়া বাংলাদেশের সাম্প্রতিক যে কোন ডাটা বা তথ্য এই বইতে পাবেন ...
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Community pharmacy- Social and preventive pharmacy UNIT 5
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4. Development of Embryo_2.pptx embryo beginning
- 2. • After double fertilization – Each ovule develops into a seed seed(s)
- 3. Developmental Stages Early Mid Late 19.36 pre- globular globular transition heart torpedo mature Buchanan et al, 2000, Biochemistry and Molecular Biology of Plants
- 4. Simplified Structure of A Mature Seed Seed coat is dead tissue. It protects everything inside it. Embryo is a minute plant . Endosperm provides energy for seed germination and early seedling growth. • In a common garden bean, a eudicot
- 5. – The embryo consists of the hypocotyl, radicle, and thick cotyledons (a) Common garden bean, a eudicot with thick cotyledons. The fleshy cotyledons store food absorbed from the endosperm before the seed germinates. • The seeds of other eudicots, such as castor beans – Have similar structures, but thin cotyledons Seed coat Radicle Epicotyl Hypocotyl Cotyledons
- 6. Hypocotyl Radicle Seedcoat Endosperm Cotyledons Epicotyl Hypocotyl Radicle (b) Castor bean, a eudicot with thin cotyledons. The narrow, membranous cotyledons (shown in edge and flat views) absorb food from the endosperm when the seed germinates. • The embryo of a monocot – Has a single cotyledon, a coleoptile, and a coleorhiza
- 7. (c) Maize, a monocot. Like all monocots, maize has only one cotyledon. Maize and other grasses have a large cotyledon called a scutellum. The rudimentary shoot is sheathed in a structure called the coleoptile, and the coleorhiza covers the young root. Embryogenesis &Seed development Embryo development: 1. Establishment of patterns 2. Establishment of meristem regions Scutellum (cotyledon) Coleoptile Coleorhiza Pericarp fused with seed coat Endosperm Epicotyl Hypocotyl Radicle