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.
Flowers are the reproductive structures of flowering plants that mediate the union of male sperm and female ovum to produce seeds. They attract pollinators like insects, bats, and birds through traits like scent, color, and nectar guides to facilitate the transfer of pollen between flowers. A flower's form, including the arrangement of stamens and pistils, ensures pollen grains are transferred to the bodies of pollinators. Flowers are heterosporangiate, producing pollen and ovules as male and female spores in different organs within specialized floral structures.
Jurnalul personajului caragialian
Statutul personajului
Replici semnificative ale personajului
Explicația numelui personajului
Modalități de caracterizare
În ce tipologie se încadrează?
Portretul moral al personajului
Prezența personajului în didascalii
Actualitatea personajului în societatea actuală
Mesajul destinat către Cațavencu
Wall layers of anther have different functions most importantly they help in providing nutrition to developing pollens and also help in anther dehiscence.
Rosaceae, the rose family, is a medium-sized family of flowering plants, including 4,828 known species in 91 genera. The name is derived from the type genus Rosa
Fertilization is the fusion of male and female sex cells within an ovule, resulting in the development of an embryo and seed. Pollen germination begins when a pollen grain lands on a stigma and absorbs water and nutrients, causing it to swell and the pollen tube to emerge and elongate through styles and ovary tissues. The pollen tube is guided to the ovule by chemical signals, where the sperm cells fuse with the egg cell, completing fertilization. Factors like temperature, humidity and compatibility between pollen and stigma affect the germination and growth of pollen tubes.
The document describes the development of flowers in Arabidopsis thaliana. It discusses:
1) The ABC model of floral organ identity specification, which proposes that three classes of genes (A, B, and C) interact to specify the four types of floral organs in each whorl.
2) The model was later expanded to the ABCE model with the addition of E-function genes that are required together with the ABC genes to specify organ identity.
3) Most of the floral organ identity genes are MADS-box transcription factors that form protein complexes to regulate floral organ development.
Division Anthophyta contains flowering plants (angiosperms) which differ from non-flowering seed plants (gymnosperms) in producing flowers and fruits. Angiosperms enclose their ovules within a carpel and after fertilization the ovule develops into a seed within the fruit. Flowers function to protect gametes and aid in pollination and fertilization. A flower typically has four specialized whorls - calyx, corolla, androecium and gynoecium. Floral parts can be described using formulas and diagrams which indicate symmetry, part numbers and relationships.
The Orchidaceae is one of the two largest flowering plant families, containing over 100,000 species. Orchids are found all over the world apart from glaciers, with the richest diversity in the tropics. They have evolved specialized pollination mechanisms and highly modified flowers and roots. Orchids first appeared 76-84 million years ago, potentially coexisting with dinosaurs. They have a wide variety of uses including perfume ingredients and cultivation for their attractive blooms.
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.
Flowers are the reproductive structures of flowering plants that mediate the union of male sperm and female ovum to produce seeds. They attract pollinators like insects, bats, and birds through traits like scent, color, and nectar guides to facilitate the transfer of pollen between flowers. A flower's form, including the arrangement of stamens and pistils, ensures pollen grains are transferred to the bodies of pollinators. Flowers are heterosporangiate, producing pollen and ovules as male and female spores in different organs within specialized floral structures.
Jurnalul personajului caragialian
Statutul personajului
Replici semnificative ale personajului
Explicația numelui personajului
Modalități de caracterizare
În ce tipologie se încadrează?
Portretul moral al personajului
Prezența personajului în didascalii
Actualitatea personajului în societatea actuală
Mesajul destinat către Cațavencu
Wall layers of anther have different functions most importantly they help in providing nutrition to developing pollens and also help in anther dehiscence.
Rosaceae, the rose family, is a medium-sized family of flowering plants, including 4,828 known species in 91 genera. The name is derived from the type genus Rosa
Fertilization is the fusion of male and female sex cells within an ovule, resulting in the development of an embryo and seed. Pollen germination begins when a pollen grain lands on a stigma and absorbs water and nutrients, causing it to swell and the pollen tube to emerge and elongate through styles and ovary tissues. The pollen tube is guided to the ovule by chemical signals, where the sperm cells fuse with the egg cell, completing fertilization. Factors like temperature, humidity and compatibility between pollen and stigma affect the germination and growth of pollen tubes.
The document describes the development of flowers in Arabidopsis thaliana. It discusses:
1) The ABC model of floral organ identity specification, which proposes that three classes of genes (A, B, and C) interact to specify the four types of floral organs in each whorl.
2) The model was later expanded to the ABCE model with the addition of E-function genes that are required together with the ABC genes to specify organ identity.
3) Most of the floral organ identity genes are MADS-box transcription factors that form protein complexes to regulate floral organ development.
Division Anthophyta contains flowering plants (angiosperms) which differ from non-flowering seed plants (gymnosperms) in producing flowers and fruits. Angiosperms enclose their ovules within a carpel and after fertilization the ovule develops into a seed within the fruit. Flowers function to protect gametes and aid in pollination and fertilization. A flower typically has four specialized whorls - calyx, corolla, androecium and gynoecium. Floral parts can be described using formulas and diagrams which indicate symmetry, part numbers and relationships.
The Orchidaceae is one of the two largest flowering plant families, containing over 100,000 species. Orchids are found all over the world apart from glaciers, with the richest diversity in the tropics. They have evolved specialized pollination mechanisms and highly modified flowers and roots. Orchids first appeared 76-84 million years ago, potentially coexisting with dinosaurs. They have a wide variety of uses including perfume ingredients and cultivation for their attractive blooms.
Anthropogenesis is the genesis or development of the human race, especially as a subject of scientific study.
Hominization, also called anthropogenesis, refers to the process of becoming human and is used in somewhat different contexts in the fields of paleontology and paleoanthropology, archeology, philosophy, and theology.
Understandings:
Most species occupy different trophic levels in multiple food chains
A food web shows all the possible food chains in a community
The percentage of ingested energy converted to biomass is dependent upon the respiration rate
The type of stable ecosystem that will emerge in an area is predictable based on climate
In closed ecosystems energy but not matter is exchanged with the surroundings
Disturbance influxes the structure and rate of change within ecosystems
Applications:
Conversion ratio in sustainable food production practices
Consideration of one example how humans interfere with nutrient cycling
Skills:
Comparison of pyramids of energy from different ecosystems
Analysis of a climograph showing the relationship between temperature, rainfall and the type of ecosystem
Construction of Gersmehl diagrams to show the inter-relationships between nutrient stores and flows between taiga, desert, and tropical rainforest.
Analysis of data showing a primary succession
An investigation into the effect of an environmental disturbance on an ecosystem
Understandings:
The distribution of species is affected by limiting factors
Community structure can be strongly affected by keystone species
Each species plays a unique role within a community because of the unique combination of its spatial habitat and interactions with other species
Interactions between species in a community can be classified according to their effect
Two species cannot survive indefinitely in the same habitat if their niches are identical
ATL / Approaches to teaching and learning /Mariam Ohanyan
Inquiry-based Learning includes teaching methods built on students' individual knowledge and interests and emphasizes learning how to learn and how to find out, using both traditional and contemporary media. Each teacher has the mandate that the learning within their classroom must be engaging, relevant challenging and
Այս սահիկաշարը ստեղծվել է ավագ դպրոցի սաների և ուսանողների համար, որոնք արժևորում են գիտության մեջ հետազոտական աշխատանքի կարևորությունը: Այն հնարավորություն է տալիս առավել լավ պատկերացնել ՙՙվարկած՞՞ և ՙՙփոփոխականներ՞՞ հասկացույունները և հետազոտական հարց, վարկած ձևակերպելու ուղիները:
A clade is a group of organisms that have evolved from a common ancestor.
Cladograms are tree diagrams that show the most probable sequence of divergence in clades.
Evidence for which species are part of a clade can be obtained from the base sequence of a gene or the corresponding amino acid sequence of a protein.
Sequence differences accumulate gradually so there is a positive correlation between the number of differences between two species and the time since they diverged from a common ancestor.
Traits can be analogous or homologous.
Evidence from cladistics has shown that classification of some groups based on structure did not correspond with the evolutionary origins of a group or species.
The binomial system of names for species is universal among biologists and has been agreed and developed at a series of congresses.
When species are discovered they are given scientific names using the binomial system.
All organisms are classified into three domains.
Taxonomists classify species using a hierarchy of taxa.
The principal taxa for classifying eukaryotes are kingdom, phylum, class, order, family, genus and species.
In a natural classification, the genus and accompanying higher taxa consists of all the species that have evolved from one common ancestral species.
Natural selection can only occur if there is variation among members of the same species.
Mutation, meiosis and sexual reproduction cause variation between individuals in a species.
Adaptations are characteristics that make an individual suited to its environment and way of life.
Species tend to produce more offspring than the environment can support.
Individuals that are better adapted tend to survive and produce more offspring while the less well adapted tend to die or produce fewer offspring.
Individuals that reproduce pass on characteristics to their offspring.
Natural selection increases the frequency of characteristics that make individuals better adapted and decreases the frequency of other characteristics leading to changes within the species.
Topic 4.1 species, communities and ecosystemsMariam Ohanyan
Skills:
1.Classifying species as autotrophs, consumers, detritivores or saprotrophs from a knowledge of their mode of nutrition.
2.Setting up sealed mesocosms to try to establish sustainability.
3. Testing for association between two species using the chi-squared test with data obtained by quadrat sampling.
4. Recognizing and interpreting statistical significance.
This document is created for SL and HL IBDP students. It will help them better understand the content of the 3 main topics("Ecology", "Evolution", "Human physiology" ) of the core before the final exams.
This document is created for SL and HL IBDP students. It will help them better understand the content of the 3 main topics("Ecology", "Evolution", "Human physiology" ) of the core before the final exams.
Evolution occurs when heritable characteristics of a species change.
The fossil record provides evidence for evolution.
Selective breeding of domesticated animals shows that artificial selection can cause evolution.
Evolution of homologous structures by adaptive radiation explains similarities in structure when there are differences in function.
Populations of a species can gradually diverge into separate species by evolution.
Continuous variation across the geographical range of related populations matches the concept of gradual divergence.
Personal Project Guide by Mrs. Mariam OhanyanMariam Ohanyan
The Personal Project is an independent assignment that can be on any topic and take any form as long as it has a strong connection to one Area of Interaction. If you choose the right Personal Project, it will give you the opportunity to share with others something that is important to you, and it will be an exciting and rewarding experience.
It is your project that demonstrates the skills you have developed over the years in the Middle Years Program (MYP). The Personal Project holds a special place of importance in the MYP, as it is a culminating even which is completed in the final year of the program (Grade 10).
You will be working on your project over the course of many months, so be sure you pick a topic in which you have a strong interest or genuine curiosity. The project will consist of the actual project, the process journal that documents your ideas and work throughout the project, and the personal report which will be summarize your overall experience.
The Personal Project is an independent assignment that can be on any topic and take any form as long as it has a strong connection to one Area of Interaction. If you choose the right Personal Project, it will give you the opportunity to share with others something that is important to you, and it will be an exciting and rewarding experience.
It is your project that demonstrates the skills you have developed over the years in the Middle Years Program (MYP). The Personal Project holds a special place of importance in the MYP, as it is a culminating even which is completed in the final year of the program (Grade 10).
You will be working on your project over the course of many months, so be sure you pick a topic in which you have a strong interest or genuine curiosity. The project will consist of the actual project, the process journal that documents your ideas and work throughout the project, and the personal report which will be summarize your overall experience.
This article address the importance of social skills in approaches to learning. DP students must become aware how science work and how to communicate with others to achieve the best results in the learning process.
Կենսաբանություն առարկայում վիճակագրության կիրառման ուղեցույց՝ նախատեսված ավա...
Թեմա 4. ծաղկի_կառուցվածքը
1. ԾԱՂԿԻ ԿԱՌՈՒՑՎԱԾՔԸ
Ծաղիկ, կարճացած և ձևափոխված ընձյուղ, կատարում է
միկրո և մակրոսպորոգենեզի, փոշոտման,
բեղմնավորման, սաղմի զարգացման և պտղի գոյացման
ֆունկցիա։ Առաջանում է տերևներից զուրկ
ցողունի՝ ծաղկակոթի վրա:
3. Ծաղկի արտաքին կառուցվածքը
Բույսի օրգաններն են.՝
ՎԵԳԵՏԱՏԻՎ ԳԵՆԵՐԱՏԻՎ
ԱՐՄԱՏ ԾԱՂԻԿ
ԸՆՁՅՈՒՂ ՊՏՈՒՂ
ՍԵՐՄ
Ծաղիկները զարգանում են
ծաղկաբողբոջներից։
Սովորաբար
ծաղիկը ցողունին է միանում
ծաղկակոթով, որի լայնացած
մասը կոչվում է ծաղկակալ։
Սակայն որոշ բույսերի
ծաղիկներ ծաղկակոթ չունեն և
անմիջապես միանում են
ցողունին (նստադիր
ծաղիկներ)։
6. ՎԱՐՍԱՆԴԻ ԿԱՌՈՒՑՎԱԾՔԸ
1. ՍՊԻ
2. ՍՌՆԱԿ
3. ՍԵՐՄՆԱՐԱՆ
4. ՎԱՐՍԱՆԴ
Վարսանդը կազմված
է սպիից, սռնակից և սերմնարա-
նից։ Սերմնարանի ներսում են
գտնվում մեկ կամ մի
քանի սերմնաբողբոջներ, որոնցից
զարգանում ենսերմերը, իսկ
ամբողջ սերմնարանից՝ պտուղը։
Վարսանդի սպին կարողանում է
իր վրա պահել փոշեհատիկը։
