Plants have evolved structural adaptations for life on land, including mechanisms for transporting water and minerals throughout the plant and supporting structures to withstand gravitational and environmental forces. Plant cells contain cell walls, chloroplasts, and a large central vacuole. There are four main types of plant cells - parenchyma, collenchyma, sclerenchyma, and vascular cells. The basic structures of plants are roots, stems, leaves, and flowers. Roots anchor plants and absorb water and minerals, stems provide structure and transport, leaves perform photosynthesis, and flowers facilitate reproduction.
O documento descreve as principais partes e funções de uma flor, incluindo sépalas, pétalas, carpelos, estames e suas respectivas funções na reprodução, classificação e usos industriais, medicinais e ornamentais de plantas.
Mineral nutrition in plants, Hydroponics, Toxic elements, Micro, Macro nutrie...HARINATHA REDDY ASWARTHA
This document discusses mineral nutrition in plants. It describes the essential mineral elements required by plants, including macronutrients like nitrogen, potassium, calcium, and magnesium, as well as micronutrients. Methods for studying mineral requirements like hydroponics are explained. Hydroponics has been used commercially for crops like tomatoes and lettuce. The criteria for determining if an element is essential to plants is also summarized.
The document discusses key topics in plant biology, including:
- Taxonomy and the classification system developed by Linnaeus, grouping organisms into kingdoms, phyla, classes, orders, families, genera, and species.
- Major plant groups like bryophytes, ferns, gymnosperms, and angiosperms. Angiosperms are flowering plants that produce seeds within fruits, and include important agricultural crops.
- Plant and cell structure, including organelles like chloroplasts for photosynthesis and mitochondria for cellular respiration.
- Plant anatomy, including roots that absorb water and minerals, stems that transport fluids and store food, and leaves that perform photosynthesis.
- Flower structure, with stam
1. Gymnosperms are seed plants characterized by naked seeds not enclosed in an ovary. They reproduce through cones and include four divisions - cycads, conifers like pine, ginkgo, and gnetophytes.
2. Angiosperms are flowering plants that have seeds enclosed in an ovary. They have true flowers with sepals, petals, pistils and stamens. Angiosperms are divided into monocots and dicots.
3. Plant reproduction can occur through wind, water, or animal pollination. Pollination results in fertilization and seed formation through complex cellular processes within the ovules and pollen grains.
Integrated Science Fertilization & Fruit FormationeLearningJa
The document discusses the process of fruit formation after fertilization occurs in flowers. It begins by explaining that once pollination happens in flowers, fertilization must also occur for the development of seeds and fruits. Fertilization involves the fusion of male gametes from pollen with female gametes in the ovule, resulting in the formation of a seed containing an embryo. The ovary of the flower then begins to enlarge and develop into a fruit, protecting and housing the seed. As this process occurs, other floral parts like petals and sepals typically shrivel and fall off. Different fruits have various structures and seed arrangements adapted for seed dispersal. The key events that mark the transition from flower to fruit are fertilization
O caule possui funções de conectar raízes e folhas e transportar água e nutrientes. Pode ser herbáceo, sublenhoso ou lenhoso. Existem diversos tipos de caules como rastejantes, trepadores, eretos e subterrâneos como rizomas e tubérculos.
1. Plants reproduce both asexually through methods like bulbs, tubers, runners and spores, and sexually through the flower.
2. In sexual reproduction, pollen is transferred from the anther to the stigma either through self or cross pollination, leading to fertilization.
3. After fertilization, the ovary develops into a fruit containing seeds, which are then dispersed and germinate under the right conditions to form new plants.
Plants have evolved structural adaptations for life on land, including mechanisms for transporting water and minerals throughout the plant and supporting structures to withstand gravitational and environmental forces. Plant cells contain cell walls, chloroplasts, and a large central vacuole. There are four main types of plant cells - parenchyma, collenchyma, sclerenchyma, and vascular cells. The basic structures of plants are roots, stems, leaves, and flowers. Roots anchor plants and absorb water and minerals, stems provide structure and transport, leaves perform photosynthesis, and flowers facilitate reproduction.
O documento descreve as principais partes e funções de uma flor, incluindo sépalas, pétalas, carpelos, estames e suas respectivas funções na reprodução, classificação e usos industriais, medicinais e ornamentais de plantas.
Mineral nutrition in plants, Hydroponics, Toxic elements, Micro, Macro nutrie...HARINATHA REDDY ASWARTHA
This document discusses mineral nutrition in plants. It describes the essential mineral elements required by plants, including macronutrients like nitrogen, potassium, calcium, and magnesium, as well as micronutrients. Methods for studying mineral requirements like hydroponics are explained. Hydroponics has been used commercially for crops like tomatoes and lettuce. The criteria for determining if an element is essential to plants is also summarized.
The document discusses key topics in plant biology, including:
- Taxonomy and the classification system developed by Linnaeus, grouping organisms into kingdoms, phyla, classes, orders, families, genera, and species.
- Major plant groups like bryophytes, ferns, gymnosperms, and angiosperms. Angiosperms are flowering plants that produce seeds within fruits, and include important agricultural crops.
- Plant and cell structure, including organelles like chloroplasts for photosynthesis and mitochondria for cellular respiration.
- Plant anatomy, including roots that absorb water and minerals, stems that transport fluids and store food, and leaves that perform photosynthesis.
- Flower structure, with stam
1. Gymnosperms are seed plants characterized by naked seeds not enclosed in an ovary. They reproduce through cones and include four divisions - cycads, conifers like pine, ginkgo, and gnetophytes.
2. Angiosperms are flowering plants that have seeds enclosed in an ovary. They have true flowers with sepals, petals, pistils and stamens. Angiosperms are divided into monocots and dicots.
3. Plant reproduction can occur through wind, water, or animal pollination. Pollination results in fertilization and seed formation through complex cellular processes within the ovules and pollen grains.
Integrated Science Fertilization & Fruit FormationeLearningJa
The document discusses the process of fruit formation after fertilization occurs in flowers. It begins by explaining that once pollination happens in flowers, fertilization must also occur for the development of seeds and fruits. Fertilization involves the fusion of male gametes from pollen with female gametes in the ovule, resulting in the formation of a seed containing an embryo. The ovary of the flower then begins to enlarge and develop into a fruit, protecting and housing the seed. As this process occurs, other floral parts like petals and sepals typically shrivel and fall off. Different fruits have various structures and seed arrangements adapted for seed dispersal. The key events that mark the transition from flower to fruit are fertilization
O caule possui funções de conectar raízes e folhas e transportar água e nutrientes. Pode ser herbáceo, sublenhoso ou lenhoso. Existem diversos tipos de caules como rastejantes, trepadores, eretos e subterrâneos como rizomas e tubérculos.
1. Plants reproduce both asexually through methods like bulbs, tubers, runners and spores, and sexually through the flower.
2. In sexual reproduction, pollen is transferred from the anther to the stigma either through self or cross pollination, leading to fertilization.
3. After fertilization, the ovary develops into a fruit containing seeds, which are then dispersed and germinate under the right conditions to form new plants.
Plant Transpiration
The document discusses the process of transpiration in plants. Transpiration occurs as water moves through the xylem and evaporates from plant leaves through stomata. Stomata are openings in leaves that are controlled by guard cells and open to allow gas exchange needed for photosynthesis. Transpiration creates negative pressure that pulls water up from the roots and cools the plant. Factors like light, temperature, humidity, and wind can affect the rate of transpiration. Desert plants have adaptations like reduced leaves and stomata to minimize water loss through transpiration.
T.S in Stem & Root Type of Vascular bundlesMona Ismail
This document summarizes key differences between monocot and dicot stems and roots. It discusses differences in vascular bundle number and arrangement, presence of cambium and secondary thickening, and annual ring formation. It also describes different types of steles like protostele, siphonostele, and actinostele. Finally, it outlines different arrangements of xylem and phloem in vascular bundles, including conjoint, collateral, bicollateral, radial, concentric, amphicribral, and amphivasal.
This document provides information about plants and their basic needs and parts. It discusses how plants take in water through their roots, the parts of a plant including flowers, leaves, roots and stems. It also outlines what parts of plants we can eat, such as fruits, vegetables, roots, stems and leaves. Examples given include apples, carrots, celery and lettuce. The document explains that plants are living things that grow, produce seeds for new plants, and eventually die.
O documento descreve a estrutura e função das flores. Ele explica que as flores são compostas por um pedicelo, receptáculo floral e quatro verticilos - cálice, corola, androceu e gineceu. Também discute a polinização, os tipos de polinização e as funções das flores na reprodução das plantas.
O documento discute os movimentos e hormônios vegetais. Apresenta os principais tipos de movimentos de plantas com ou sem deslocamento, incluindo tropismos, tactismos e nastismos. Também descreve os principais hormônios vegetais - auxinas, giberelinas, citocinas, ácido abscísico e etileno - e seus efeitos no crescimento, desenvolvimento e respostas das plantas a estímulos.
Light is a major environmental factor that influences seedling development. During seed germination, light controls whether seedlings develop normally (de-etiolation) or abnormally in the dark (etiolation). In the dark, seedlings undergo etiolation with limited organ development and no chlorophyll production. When exposed to light, seedlings undergo de-etiolation where they develop properly with chlorophyll synthesis and organ development. This process of de-etiolation from the etiolated state to normal growth is triggered by light and involves photoreceptors such as phytochromes that detect light and induce changes in seedling development.
O documento descreve as estruturas e processos envolvidos na germinação de sementes e no desenvolvimento inicial das plantas, incluindo a formação da raiz, caule e folhas a partir do embrião. Também discute a anatomia e tipos de raízes, caules e folhas.
Primary growth occurs at the shoot and root apical meristems, adding new cells and increasing length. Secondary growth occurs through the vascular cambium in woody stems and roots, adding girth over time. The vascular cambium produces secondary xylem towards the inside and secondary phloem towards the outside, resulting in increased thickness. Cork cambium also forms layers of protective cork over years of secondary growth.
O documento descreve as partes principais de uma planta, incluindo o caule. O caule conecta a raiz aos outros órgãos e tem funções como suporte, transporte de água e nutrientes, e armazenamento de substâncias de reserva. O texto também explica os diferentes tipos de caule, como aéreos, aquáticos e subterrâneos.
The document summarizes the characteristics of plants in the coffee family. Key points include:
- Plants are usually trees, shrubs, lianas or herbs found worldwide, especially in tropical areas.
- Leaves are simple with entire margins and often arranged in a decussate pattern.
- Flowers are usually bisexual with 4-5 parts and borne in cymes or umbels.
- The ovary is usually inferior with axile or parietal placentation.
- Fruits include berries, capsules, drupes or schizocarps.
O documento discute a condução e transpiração em plantas. A condução da seiva elaborada ocorre dos tecidos foliares para os demais tecidos segundo a hipótese de Münch. A transpiração é a perda de água na forma de vapor, ocorrendo principalmente pelos estômatos. A abertura e fechamento dos estômatos regulam a transpiração e estão ligados à fotossíntese e trocas gasosas.
Chapter 9 Transport in Plants Lesson 1 - Monocotyledons and dicotj3di79
The document discusses vascular bundles, which transport materials in flowering plants. It describes the key components of vascular bundles - xylem, phloem, and cambium - and how to identify them in microscopic slides. The document contrasts the characteristics of monocots and dicots, such as their vascular bundle arrangement, leaf veins, root structure, and floral parts. Micrographs are provided to show vascular bundle orientation in stems, roots, and leaves.
Leaves are green, flattened structures attached directly or via a stalk to plant stems. They are the main organs that perform photosynthesis and transpiration. The parts of a leaf include the leaf margin or edge, which can be palmate or cordate shaped.
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
O documento descreve a constituição de uma flor, incluindo seus órgãos masculinos e femininos e como eles permitem a reprodução da planta através da polinização.
O documento descreve as principais partes e funções do caule vegetal, incluindo suas regiões, gemas e tipos. Discorre sobre a estrutura interna do caule, adaptações e modificações como espinhos. Apresenta diagramas ilustrando estruturas como gemas axilares, tipos de ramificação e estrutura secundária do caule.
[1] O documento discute os processos de desenvolvimento, crescimento e diferenciação vegetal. [2] Inclui informações sobre as fases do desenvolvimento, indução floral, tipos de meristemas e suas funções no crescimento primário e secundário. [3] Também aborda os processos de embriogênese, crescimento celular e fatores que influenciam a transição para a fase reprodutiva.
This document summarizes key trends in plant evolution such as the reduction of the gametophyte generation and specialization of the sporophyte generation. It also describes the development of vascular tissue which improved water and nutrient transport within plants. Additionally, it reviews plant classification including bryophytes, seedless vascular plants like ferns and horsetails, gymnosperms, and flowering plants. Seedless vascular plants were dominant during the late Devonian through early Permian time periods but today are more marginal in their success.
Stems have several functions including supporting and transporting water and nutrients between roots and leaves. They also produce and support leaves, flowers, and fruits. Stems come in two main types - herbaceous stems which are soft, green and annual, and woody stems which are tough, not green, and perennial. Internally, stems have layers including the epidermis, cortex, and vascular bundles. Stems can also be modified for specialized functions like storage, protection, or reproduction through structures like bulbs, corms, rhizomes, tubers, and stolons.
Plant Transpiration
The document discusses the process of transpiration in plants. Transpiration occurs as water moves through the xylem and evaporates from plant leaves through stomata. Stomata are openings in leaves that are controlled by guard cells and open to allow gas exchange needed for photosynthesis. Transpiration creates negative pressure that pulls water up from the roots and cools the plant. Factors like light, temperature, humidity, and wind can affect the rate of transpiration. Desert plants have adaptations like reduced leaves and stomata to minimize water loss through transpiration.
T.S in Stem & Root Type of Vascular bundlesMona Ismail
This document summarizes key differences between monocot and dicot stems and roots. It discusses differences in vascular bundle number and arrangement, presence of cambium and secondary thickening, and annual ring formation. It also describes different types of steles like protostele, siphonostele, and actinostele. Finally, it outlines different arrangements of xylem and phloem in vascular bundles, including conjoint, collateral, bicollateral, radial, concentric, amphicribral, and amphivasal.
This document provides information about plants and their basic needs and parts. It discusses how plants take in water through their roots, the parts of a plant including flowers, leaves, roots and stems. It also outlines what parts of plants we can eat, such as fruits, vegetables, roots, stems and leaves. Examples given include apples, carrots, celery and lettuce. The document explains that plants are living things that grow, produce seeds for new plants, and eventually die.
O documento descreve a estrutura e função das flores. Ele explica que as flores são compostas por um pedicelo, receptáculo floral e quatro verticilos - cálice, corola, androceu e gineceu. Também discute a polinização, os tipos de polinização e as funções das flores na reprodução das plantas.
O documento discute os movimentos e hormônios vegetais. Apresenta os principais tipos de movimentos de plantas com ou sem deslocamento, incluindo tropismos, tactismos e nastismos. Também descreve os principais hormônios vegetais - auxinas, giberelinas, citocinas, ácido abscísico e etileno - e seus efeitos no crescimento, desenvolvimento e respostas das plantas a estímulos.
Light is a major environmental factor that influences seedling development. During seed germination, light controls whether seedlings develop normally (de-etiolation) or abnormally in the dark (etiolation). In the dark, seedlings undergo etiolation with limited organ development and no chlorophyll production. When exposed to light, seedlings undergo de-etiolation where they develop properly with chlorophyll synthesis and organ development. This process of de-etiolation from the etiolated state to normal growth is triggered by light and involves photoreceptors such as phytochromes that detect light and induce changes in seedling development.
O documento descreve as estruturas e processos envolvidos na germinação de sementes e no desenvolvimento inicial das plantas, incluindo a formação da raiz, caule e folhas a partir do embrião. Também discute a anatomia e tipos de raízes, caules e folhas.
Primary growth occurs at the shoot and root apical meristems, adding new cells and increasing length. Secondary growth occurs through the vascular cambium in woody stems and roots, adding girth over time. The vascular cambium produces secondary xylem towards the inside and secondary phloem towards the outside, resulting in increased thickness. Cork cambium also forms layers of protective cork over years of secondary growth.
O documento descreve as partes principais de uma planta, incluindo o caule. O caule conecta a raiz aos outros órgãos e tem funções como suporte, transporte de água e nutrientes, e armazenamento de substâncias de reserva. O texto também explica os diferentes tipos de caule, como aéreos, aquáticos e subterrâneos.
The document summarizes the characteristics of plants in the coffee family. Key points include:
- Plants are usually trees, shrubs, lianas or herbs found worldwide, especially in tropical areas.
- Leaves are simple with entire margins and often arranged in a decussate pattern.
- Flowers are usually bisexual with 4-5 parts and borne in cymes or umbels.
- The ovary is usually inferior with axile or parietal placentation.
- Fruits include berries, capsules, drupes or schizocarps.
O documento discute a condução e transpiração em plantas. A condução da seiva elaborada ocorre dos tecidos foliares para os demais tecidos segundo a hipótese de Münch. A transpiração é a perda de água na forma de vapor, ocorrendo principalmente pelos estômatos. A abertura e fechamento dos estômatos regulam a transpiração e estão ligados à fotossíntese e trocas gasosas.
Chapter 9 Transport in Plants Lesson 1 - Monocotyledons and dicotj3di79
The document discusses vascular bundles, which transport materials in flowering plants. It describes the key components of vascular bundles - xylem, phloem, and cambium - and how to identify them in microscopic slides. The document contrasts the characteristics of monocots and dicots, such as their vascular bundle arrangement, leaf veins, root structure, and floral parts. Micrographs are provided to show vascular bundle orientation in stems, roots, and leaves.
Leaves are green, flattened structures attached directly or via a stalk to plant stems. They are the main organs that perform photosynthesis and transpiration. The parts of a leaf include the leaf margin or edge, which can be palmate or cordate shaped.
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
O documento descreve a constituição de uma flor, incluindo seus órgãos masculinos e femininos e como eles permitem a reprodução da planta através da polinização.
O documento descreve as principais partes e funções do caule vegetal, incluindo suas regiões, gemas e tipos. Discorre sobre a estrutura interna do caule, adaptações e modificações como espinhos. Apresenta diagramas ilustrando estruturas como gemas axilares, tipos de ramificação e estrutura secundária do caule.
[1] O documento discute os processos de desenvolvimento, crescimento e diferenciação vegetal. [2] Inclui informações sobre as fases do desenvolvimento, indução floral, tipos de meristemas e suas funções no crescimento primário e secundário. [3] Também aborda os processos de embriogênese, crescimento celular e fatores que influenciam a transição para a fase reprodutiva.
This document summarizes key trends in plant evolution such as the reduction of the gametophyte generation and specialization of the sporophyte generation. It also describes the development of vascular tissue which improved water and nutrient transport within plants. Additionally, it reviews plant classification including bryophytes, seedless vascular plants like ferns and horsetails, gymnosperms, and flowering plants. Seedless vascular plants were dominant during the late Devonian through early Permian time periods but today are more marginal in their success.
Stems have several functions including supporting and transporting water and nutrients between roots and leaves. They also produce and support leaves, flowers, and fruits. Stems come in two main types - herbaceous stems which are soft, green and annual, and woody stems which are tough, not green, and perennial. Internally, stems have layers including the epidermis, cortex, and vascular bundles. Stems can also be modified for specialized functions like storage, protection, or reproduction through structures like bulbs, corms, rhizomes, tubers, and stolons.
Zelfstudielessen biologie. Gemaakt in 1999, om in de onderbouw van het VMBO te worden gebruikt. De presentaties zijn interactief als je ze download. Uiteraard kun je ze zelf aanpassen naar behoefte. Wat mij betreft vallen ze onder Creative Commons rechten. Zet je de gedownloade slides bij elkaar in een map, samen met de stuurpowerpoints, dan kun je een totaal pakket maken.Filpjes ontbreken helaas, dit in verband met copyrights.
Veel plezier!! John van Dongen
Sir Alec Jeffery's attended the University of Leicester. In 1984, he developed DNA fingerprinting which established DNA databases in 1980. He received a knighthood for his discoveries in DNA fingerprinting and its use in services and technology.
Energetische valorisatie van grasmaaisel uit natuurgebieden en bermen easyFairs_belgium
Energetische valorisatie van grasmaaisel uit natuurgebieden en bermen. Presentatie door Willy Verbeke (Ondersteunend Centrum van het Agentschap voor Natuur en Bos) tijdens IFEST 2012, op woensdag 15 februari in Flanders Expo.
www.ifest.be
Thema planten basisstof 2. Dit is geen samenvatting. Dit zijn slides voor tijdens de les en opdrachten ter verwerking.
Upload is bedoeld voor de leerlingen die tijdens het leren behoefte hebben aan herhaling en een klein beetje verdieping door hyperlinks in de tekst te volgen.
ADBREVIO connects agriculture with renewable energy resources by providing knowledge and expertise. They work with agriculture and finance specialists, engineers, and scientists to create value across the renewable energy supply chain. ADBREVIO offers on-farm extension services and practical advice to growers on energy crop cultivation. They also support international agricultural projects through feasibility studies, training, and capacity building. ADBREVIO's renewable energy expertise includes research and support for biofuel, biogas, and biomass production from crops as well as utilizing solar, wind, and other renewable sources.
Presentatie Handboek bodem en bemesting en Commissie bemesting akkerbouw en vollegrondsgroenten (CBAV) op Dag van de precisiebemesting 27 november 2015 in Wageningen
The powerpoint is about the major crops grown by farmers every year to meet the requirements of a large population.These crops are harvested for food,clothing,livestock fodder,biofuel,medicine and other uses.These major crops supply raw materials for agricultural-based industries.These crops are grown in various seasons based on geographical conditions,climatic factors,type of soil and various other things.
This document provides information on several members of the Solanaceae family including tobacco, potato, chili, tomato, and brinjal. It describes their botanical classification, morphological features, growth conditions, cultivation practices, and economic importance. The key features shared among these crops are that they have alternate leaves, five petaled flowers, and superior ovaries. They generally grow best in warm, tropical or subtropical climates with adequate rainfall and irrigation.
Plants need water, light, nutrients, and air to grow. Water is necessary for seed germination and plant growth. Plants use sunlight to photosynthesize and make their own food. Nutrients from the soil provide minerals for healthy growth. Light, air, and water allow plants to photosynthesize and produce food to support growth and health.
The document provides information about the morphology, microscopic features, chemical constituents and uses of various seeds including black mustard, white mustard, fenugreek, plantain, colchicum, cardamom, nigella, cocoa, castor, coffee, stramonium, pumpkin and calabar beans. For each seed, it describes its botanical origin, active chemical constituents which are responsible for its pharmacological actions, and traditional uses. The seeds discussed have various medicinal properties and uses such as laxatives, emetics, rubefacients, bronchodilators, stimulants etc.
Bruikbaar bij de paragraaf 7.3 van nectar voor de eerste of tweede klas Havo/vwo. Of voor andere biologiemethoden waarbij dieper wordt ingegaan op de functie van voedingstoffen. Specifiek; beschermende, energetische en bouwstoffen.
Practicum aantonen van zetmeel met indicator jodium. Ook wordt ingegaan op de werking van speeksel en andere enzymen in het lichaam. Voeding en vertering.
2. Welke onderdelen gaan we bekijken?
• In het practicum met de tulp bekijken we het
vruchtbeginsel. Hierin zijn de volgende
onderdelen te herkennen.
– Zaadbeginsel
– Vaatbundels
– Vulweefsel
– Epidermis
3. Welke onderdelen gaan we bekijken?
• In het practicum met de lelie bekijken we een
dwarsdoorsnede van de helmknop. Hierin zijn
de volgende onderdelen te herkennen.
– Epidermis
– Parenchym
– Vaatbundel
– Tapetum
– Helmhokje
4. Wat is het vruchtbeginsel?
• Het vruchtbeginsel groeit uit tot een vrucht.
• In een vrucht zit een zaadbeginsel (embryo)
dat zich ontwikkeld tot een zaad.
5. Wat is het vruchtbeginsel?
• Het vruchtbeginsel groeit uit tot een vrucht.
• In een vrucht zit een zaadbeginsel (embryo)
dat zich ontwikkeld tot een zaad.
Zie video
6. Wat is het vruchtbeginsel?
• Niet alle planten met bloemen maken ook
echt vruchten die we eten.
Hoe verandert de
paardenbloem?
Hoe verandert de bloesem
van de perenboom?
7. Heeft de tulp een vrucht?
• Het vruchtbeginsel van de tulp zwelt op.
(Nadat de meeldraden en bloemblaadjes zijn
afgevallen)
Uiteindelijk droogt ie uit en
knapt de vrucht open zodat de
zaadjes eruit vallen.
8. Hoe kwam het preperaat tot stand?
VOORBEREIDING PRACTICUM
VRUCHTBEGINSEL - TULP
20. In het zaadbeginsel bevindt zich het
embryo van de plant.
• Het hele zaadbeginsel verandert in het zaadje.
• Het embryo is het kiemplantje dat in de zaad
aanwezig is.
21. Hoe kwam het preperaat tot stand?
VOORBEREIDING PRACTICUM
HELMKNOP - LELIE
30. De tekening
Teken alleen een gedeelte waarin alles aanwezig is. Niet
het hele preperaat! Teken geen cellen maar geef de
lagen aan zoals hieronder wordt aangegeven.
Epidermis
Buitenwand (zetmeel)
Tapetum
Binnenwand (platte cellen)
Ontwikkelende
stuifmeelkorrel
Parenchym
Vaatbundel
Helmhokje
31. Nadenken over…
• Hoe gaat bevruchting?
• Hoe zorgt een bloem ervoor dat ie zichzelf niet
bevrucht?
• Waarom worden bloemen in een vaas nooit
vruchten?