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SCIENCE - THE PLANT LIFE CYCLE (CLASS V)
The document discusses the reproduction and life cycle of flowering plants, emphasizing the importance of seeds, pollination, and the various methods of plant reproduction including through seeds, stems, leaves, and spores. It explains the anatomy of flowers and the functions of different flower parts in reproduction. Additionally, it outlines specific plant examples for various reproductive methods and summarizes the germination process and factors necessary for seed growth.
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SCIENCE - THE PLANT LIFE CYCLE (CLASS V)
- 2. You must bethinking that why such useless seeds are presents in delicious fruit. A seed is equally important for a plant as all its other parts.
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- 4. What Will ILearn? 1. Know why plants reproduce. 2. Understand the different stages in the life cycle of a flowering plant. 3. Know that seeds need water, air and warmth for germination. 4. Observe that plants produce flowers which have male and female organs. 5. Know that seeds are formed after a flower is pollinated. 6. Understand how pollination take place.
- 6. Why do plantsreproduce ? Plants are Living thing • They do not live for forever • They will die one day • Plants reproduce to ensure the continuity of their species. Plants reproduce • Mostly from seeds • Some reproduce from parts of plants oStem oSpores oLeaf
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- 8. POTATO SWEET POTATO Potatoreproduces by the underground part of its fleshy stem Sweet potato reproduces by underground part of its flesh root. Potato has some eye spots on the underground part of its stem through which it multiplies. Sweet potato doesn’t have any eye spot. • By comparing the reproduction process of potato and sweet potato, write down one similarities and difference between the process they follow. Similarities: Both reproduce through their underground body part. Difference
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- 10. • Name twoplants that reproduce by spores. Ans. Fern, Mosses, Mushroom etc
- 11. Leaf E.g. Bryophyllum youngplant grows on the leaf margins
- 12. Complete the series Potato:Underground stems::bryophyllum: _________ Ans: Leaves Mango: seed::fern: __________ Ans. Spore
- 13. • What arethe various methods by which plants reproduce? Ans. Flowering plants reproduce directly through their seeds e.g. mango and bean. Some plants reproduce through their body parts like stems, leaves and roots. Some plants reproduce through special tiny structures called spores.
- 14. What happen inthe life cycle of a flowering plant? SEED SEEDLING YOUNG PLANT ADULT PLANT ADULT PLANT WITH FRUIT
- 15. Which seed willgrow better?
- 16. seed Made up of3 Main parts • Seed Coat to protect embryo from injury and drying out. • Embryo is an immature plant which grows into a new plant under right conditions. • Seed leaves/cotyledon contains a store of nutrients for the new plant.
- 17. Parts of theseed Seed Leaf Seed Coat Embryo (baby plant)
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- 19. Germination of aseed
- 20. Look at thepictures, and answer the question below. Which seed will grow better?
- 21. • A youngplant is called _________. a) a seed b) an embryo c) a root d) a seedling Ans. The correct answer is "a seedling”. The seed grows into a small plant called the seedling. The seedling grows into an adult plant.
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- 23. • Some fruitsseeds are waterproof and can float in water. Give example Ans. Coconut seeds are waterproof and can float in water. • What do we call the practice of germinating seeds and growing plants from them on a large scale? Ans. Cropping • What is the function of flowers in the plants? Ans. They help in reproduction in plants.
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- 25. Did you know…? Theflowers of some plants have just one ovule in their ovary, and so grow fruit with just one seed inside, such as a peach. Others have ovaries containing lots of ovules, and so produce
- 26. Pollen Grains Pollen sacs Filament MaleReproductive partsof flower
- 27. Male Reproductive partsofflower Structure of stamen Anther Filament • Filament is the thin stalk supporting the anther • Anther is found on top of the filament. It contains Pollen sacs that release pollen grains. • Pollen grains are powdery substance found on anther. They contain male reproductive cell.
- 28. Female Reproductive partsof flower Stigma Style Ovary Ovule • Stigma is commonly seen in the centre of the flower. It is covered in a sticky substance to allow the pollen grains to stick to it • The Style raises the stigma to increase the chances of pollination. • Ovary contains and protects ovules. • Ovules contains the female reproductive part called the egg.
- 31. Give two examplesof each of the following. • Plants that can grow from their roots Ans. Carrot, sweet potato • Plants that can grow from their stems Ans. Rose, hibiscus • Plants that can grow from their leaves Ans. Bryophyllum, begonia • Plants that can grow from their seeds Ans. Mango, bean
- 32. POLLINATION • Pollination istransfer of pollen grains from anther to stigma of same species. • Pollen grains can be carried by • Wind • Animals (Mammals ,Birds , Insects)
- 33. SELFPOLLINATION The transfer ofpollens from the anther to the stigma of the same flower or another flower born on the same plant is called self-pollination.
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- 35. • Different plantschoose different ways to reproduce. Why don’t all plants use common way to reproduce? Ans. As we know that on earth there are a great variety of plants, some are very big and some are very small. Some are found on land and some are aquatic. So, according to their suitability they perform the same process by different ways. Just like this, ways of reproduction also vary greatly among different plants.
- 36. • What isn'ta carrot a fruit? a) It is orange. b) It isn't juicy. c) It grows underground. d) It has no seeds.
- 37. • The __________of the plant carries water and nutrients to its different parts. a) embryo b) stem c) root d) leaf The correct answer is "stem." The stem is the part of the plant that helps to carry water and nutrients to its different parts.
- 38. • Another namefor sprouting is a) Germination b) Pollination c) Rooting d) Stemming Ans. Germination • Which of the following is NOT a requirement for germination? a) Oxygen b) Sunlight c) Water d) Carbon dioxide Ans. Carbon dioxide
- 39. DRAG AND DROP Malereproductive part of a flower Female reproductive part of a flower Pollen Pollen Ovary Ovary Stamen Stamen Stigma Stigma Anther Anther Style Style Pistil Pistil