Cambridge Y5 - Unit 1 - Flowering Plant Life cycle.pptx

Flowering Plant Life cycle

1. Lesson 1.2: Pollination, Fruits and Seeds Cambridge Primary Science - Year 5

2. Before Getting Started

3. Plants Life Cycle

4. Flower Structure The stigma is sticky to keep hold of the pollen. The style supports the stigma and connects it to the ovary. The ovary is where the ovules, or eggs, are. The anther is the part that makes the pollen. The filament holds up the anther. The petals attract insects. The sepal leaves protect the flower before it opens. stamen carpel (pistil)

5. Flower Structure The flower has both male and female organs! The stigma, style and ovary make up the female organ. This is called the carpel . The anther and filament make up the male organ. This is called the stamen .

6. Warming-up Why do flowers have different colors and scents?

7. What is Pollination? Pollination is the transfer of pollen from the stamen (male part) to the stigma (female part) of a flower. It’s a key stage in the life cycle of flowering plants. 02

8. Types of Pollination Colorful petals, sweet scent, nectar, sticky pollen Small dull petals, no scent, no nectar, light pollen grains Insect Pollination Wind Pollination

9. Statement Answer 1. Insects pollinate plants by eating the pollen 2. Pollination is the transfer of pollen from anther to stigma . 3. Pollen is produced by the ovary. 4. Wind-pollinated plants contain very light pollen. Pollination Quiz – True or False? ❌ False – They transfer pollen while collecting nectar. ✅ True ❌ False – It is produced by the anther. ✅ True

10. the fusion of the male gamete with the female gamete to form a zygote Fertilization Pollen travels from the anther to land on stigma P roduce pollens and ovules Pollination Flower From Pollination to Fruit

11. Fertilization 03

12. Description Step A pollen grain becomes stuck to the stigma. The male sex cell fuses with a female sex cell, forming a fertilised egg cell (zygote). A tube grows out of the pollen grain, down into the ovary. The fertilised egg cell (zygote) divides and grows into an embryo. The nucleus of the pollen grain passes down the pollen tube. Stages of Fertilisation– Ordering 1 4 2 5 3

13. Lesson 1.3: How seeds are spread Cambridge Primary Science - Year 5

14. Seeds dispersal 04

15. Getting Started Why do plants make fruits and seeds? 🍎

16. Why Seeds Must Be Spread? Seed dispersal is the way seeds are carried away from the parent plant. Seeds need: Space to grow Light for photosynthesis Water and nutrients

17. Dispersal by animals eaten by animals Adaptation : colourful, juicy, and tasty. stick to their fur Adaptation : hooked seed

18. Dispersal by wind Have wings Have parachute of hairs Light, dry, and smooth seeds

19. Heavy fruits fall and roll away gravity (drop & roll) Dry pods burst open in heat Spongy covering helps them float explosion water Seed dispersal by

20. Seeds Dispersal

21. Statement Answer 1. All seeds need animals to move them. 2. Dandelion seeds can float in the air. 3. Coconut seeds can float on water. 4. Bean pods explode to spread seeds. 5. Heavy fruits are dispersed by wind. Dispersal Quiz – True or False? ❌ False ✅ True ❌ False ✅ True ✅ True

22. After seeds have been dispersed they start to grow a tiny root and a tiny shoot . We call this germination . Seeds will only germinate under certain conditions… What do you think a seed really needs to germinate? Water ? Light ? Warmth ? Let’s find out in the next section! No! I refuse to start growing unless I have my own dressing room, all my favourite foods, a personal assistant... Will it grow?

23. Lesson 1.4: Seed germination Cambridge Primary Science - Year 5

24. Germination 05

25. Worksheets

26. Review 05

27. Reflection & Summary Life cycle 1. Pollination: Pollination occurs where the pollen from the anther of one plant reaches the stigma of another plant. This can happen by wind or insects. 2. Fertilisation: A pollen tube grows into the style, and when it reaches the end the sperm (in the pollen) fertilises the egg (in the ovule). A new seed is formed. 3. Seed dispersal: Seeds need to be dispersed away from the parent plant in order to reduce competition for space, light, nutrients and water. Seeds can be dispersed by wind, water, animals or explosions. 4. Germination: