the life cycle of flowering plants - west babylon junior ：开花植物-西巴比伦少年的生活周期

Everything you need to know about flowers!,Ann Morris, Science Advisory Teacher, PPEC, 29.4.02,The Life Cycle of Flowering Plants,The life cycle shows the main stages in the life of a flower, from seed to flower and to seed again.This is the process of reproduction.,2 Types of Seed Plants,Angiosperms,Gymnosperms,Gymnosperms,Have cones for reproduction instead of flowers4 Types CycadGinkgoConiferGnetophyte,Gymnosperms,Cycads: look like ferns except they have seedsGinkgo: very large trees found mainly in China,Gymnosperms,Conifers: seeds are in cones or berrylike structuresGnetophytes: shrubs and climbing vines,Angiosperms,Largest group of plant in the worldFound in all types of climatesProduce flowers for reproduction,Angiosperms,Parts of the flower:SepalsPetalsStamenPistil,Why are some flowers so colorful?,Many flowers have brightly coloured petals and an attractive scent. This is so that they attract bees and other insects.,What does a flower do?,The main function of a flower is to reproduce and make new seeds so that new plants will grow each year.,If you look carefully at a flower, you will see that it is made up of many different parts.,Each part has an important job to do.,Sepals,The sepals protect the flower before it opens.,sepal,Petals,The petals attract pollinating insects with their bright color and attractive scent.,Male Parts,The stamens are the male structures of the flower.Made up of two parts:AntherFilament,Male Parts,Anther: top part of the stamen, that makes pollen.Filament: this is the stalk of the Anther,Female Parts,Pistil is the female structure of flower that has 3 parts:StigmaStyleOvary,Female Parts,Stigma:The pollen from another flower collects on the stigmas sticky surface.Style:raises the stigma away from the Ovary,stigma,Female Parts,Ovary protects the ovules(egg).Once fertilization has taken place it will become the fruit.,Write the correct words in the boxes:stamens, stigma, petals, ovary, sepals,these attract insects,4,where the pollen is made,pollen sticks to this,5,2,where the seeds grow,1,These protect the flower before it opens,3,Write the correct words in the boxes:stamens, stigma, petals, ovary, sepals,PLANT REPRODUCTION,Plants Reproductive Structures,Cones: GymnospermsFemale cones contain the ovules which contains the egg cellMale cones contain pollen which are like sperm cellsFlowers: AngiospermsPistil: female part of flowerStamen: Male part of flower,Pollination,Insects visit flowers to search for nectar their food.But the flowers use the insects for their own purposes!,As the insect probes for nectar, its body rubs against the stamens. Pollen gets stuck on the insects legs.You can often see bees with a heavy load of yellow pollen on their hind legs.,Pollination,When the insect visits another flower of the same type, the pollen will stick to the pistal.,This is calledpollination.,Fertilization,The pollen travels to the ovary, where it joins with an ovule.,This is called fertilization.,Seeds,Seeds: the fertilized eggSeed Structure: consists of a seed coat, a young plant, and stored food,Types of Seeds,Types of Seeds,Seeds,The seeds develop inside the ovary, which grows to become the seed pod or fruit.,Seed Dispersal,The seeds are dispersed; some by animals, some by the wind, some by explosion and some by water.,Germination,If the seed lands in a suitable place, it will germinate, and grow into a new plant.Then the cycle starts all over again.,Write these words in the boxes: germination, fertilization, pollination, seed dispersal, parent plant, plant growth,1,2,4,5,3,6,Write the correct words in the boxes:stamen, stigma, petals, ovary, ovules, pollen, sepals, anther.,The male part of the flower,This is where pollen is made,Insects carry this from flower to flower,8,7,3,These attrac