L-33 PARTS OF FLOWERgrade 6 science.pptx

Parts of a Flower

A flower is the reproductive part of a plant. It is usually made up of four main whorls (arrangements in circular layers).

1. PARTS of a FLOWER “ Everything We think We Know About….” Do all plants reproduce in the same manner? Are there male and female parts of plants? Is there connection between flowers, fruits and seeds?

2. OBJECTIVES: Compare and contrast the structure and functions of male (stamen) and female (pistil) parts of a flower. Analyze why each part of the flower is important for reproduction. Identify real-life examples of plants that use different pollination methods and explain why these methods suit them Describe the structure of seed

3. https://youtu.be/SiFaN2xQg5g

4. https://youtu.be/J2hZ- KRSfhw

5. Flowers contain the reproductive organs of a plant . Plants need flowers to help them to reproduce. Each part has a job to do in the reproduction process.

6. The Parts of a flower Most flowers have four parts: Sepals Petals Stamens Pistil

7. Parts of a flower Sepals are green leaves that protect the bud until it opens.

8. Parts of a flower Petals in some flowers are bright and colourful to attract insects.

9. Pistil (female) Pistil consists of: The stigma receives pollen. The style is a bottle- shaped organ which join the ovary and the stigma. The ovary where the seeds are produced.

10. Stamen (male) This is the male part of the flower or stamen. The Anther produces pollen grains . When the grains are fully grown, the anther splits open. The filament supports the anther.

11. Taking turns The male and female parts of a flower often mature at different times. This makes sure that the flower does not pollinate itself.

12. A SIMPLE FLOWER DISSECTED

13. A simple flower dissected: A Lily Para ver esta película, debe disponer de QuickTime™ y de un descompresor .

14. Pollination Flowering plants use the wind, insects, bats,birds and mammals to transfer pollen from the male(stamen) part of the flower to the female (stigma) part of the flower.

15. Pollination A flower is pollinated when a pollen grain lands in its stigma. The pollen fuses with an egg cell (ovule) to produce a seed. .

16. Types of Pollination Self- pollination, male & female parts on the same flower. Cross- pollination, male & female parts on different flowers.

17. Structure of Seed Main parts of a seed Seed coat The outer protective covering of the seed. It protects the seed from injury, insects, and drying out. Embryo The baby plant inside the seed. It has: Radicle → the part that will grow into the root. Plumule → the part that will grow into the shoot. Cotyledons (Seed leaves) These are thick, leaf-like structures inside the seed. They store food that the young plant uses until it can make its own food by photosynthesis.

18. ASSET 2 .If a plant's flowers had no anthers, what problem would the plant face? a) It could not make seeds. b) It could not get water. c) It could not make food. d) It could not grow roots. Answer: a) It could not make seeds. (because no pollen) 1.A farmer finds that all the flowers in his field come from the same parent plant and look exactly the same. Which type of pollination has most likely happened? a) Cross-pollination b) Self-pollination c) Wind pollination d) Insect pollination Answer: b) Self-pollination