Ch.2.less.2.how do plants grow, develop and reproduce

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Transcript of Ch.2.less.2.how do plants grow, develop and reproduce

  • 1.CHAPTER 2: LESSON 2:HOW DO PLANTS GROW, DEVELOP AND REPRODUCE?

2. Parts of the plantFlowerStemLeaves Roots 3. Needs of plants WaterSunlightNutrientsCarbon dioxide 4. Functions of Parts of the plant The flower forms seeds and fruits. (production of new plants)The stem takes water and nutrients from the roots. The Leaf takes water and nutrients (from stem) and sunlight and carbon dioxide (from the air) to make the plants food. 1) Anchors the plant in the soil. 2)The roots takes water and nutrients from the soil. 5. PARTS OF A FLOWER 6. Stame nStigm a StyleAnthe r Filame ntPistilOvaryPetalOvuleSepal Receptac leEgg 7. Sepal Protects the bud. 8. StigmaStame n The male part of the flower. (The anther produces pollen)Anthe r Filame nt(Sticky surface to catch the pollen)Style (Tube)OvaryPistil (The female part of the flower)(Tube)Petal Brightly coloured to attract insects. 9. Pollinatio n (The transfer of pollen from stamen to pistil) 10. Ways of Pollination By insects or birdsBy wind 11. Pollination by insects or birds Nectar (sweet liquid), colourful petals and scent attract the insect and birdsPollen sticks to their body.When pollinator goes to another flower the pollen sticks to the pistil. 12. Types of Pollination Self pollinationCross pollinationThe male pollinates the female of the same flower.The male pollinates the female of another flower. 13. What happens after Pollination?A pollen tube grows from the pollen to the egg. The pollen enters the egg (FERTILISATION) 14. What happens after fertilisation?A pollen tube grows from the pollen to the egg. The pollen enters the egg (FERTILISATION) 15. Structure of seed Protects the seedStores food for embryo.Baby plant