1. Year 7 Flowering plant reproduction J.Maden
De Lisle Catholic Science College Science department Key stage 3
Year 7
Flowering plant reproduction
J.Maden

2. Flowering plant reproduction explorer
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pollination
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fertilisation
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3. Plant parts Terminal bud Leaf Leaf stalk Lateral bud Stem Lateral root
Tap root

4. Sexual reproduction in plants
Ovaries
Anthers
female reproductive parts
male reproductive parts
egg cells
pollen cells
Fertilisation (nuclei join)
one egg cell
one pollen cell
Cell division
Cell division
Cell division
Cell division
Embryo
Seed
Plant

5. Parts of a flower
Petals
Stamens
Carpel
Sepals
Stalk

6. Female flower parts - carpel
Stigma
Style
Ovary containing egg cells

7. Male flower parts - stamen
Pollen cells inside pollen sac
Anther with top cut off
Filament

8. Flower part Job of part Petals Stamens Attract insects Pollen cell
(filament & anther)
Pollen cell
Carpel
(stigma, style & ovary)
Ovule (egg cell)
Attract insects
Produce pollen cells
Fertilise the egg cells
Produce egg cells
Forms a seed when fertilised by pollen

9. Pollen cells
Sticky pollen
Spiky pollen
Air sac on pollen cell

10. Insect cross pollination 1
Unripe stigma
Ripe anther releasing pollen onto insect
Flower A : Anthers fully developed and releasing pollen. Stigma not yet developed and unable to receive pollen

11. Insect cross pollination 2
Stigma receiving pollen cells from body of insect
Withered anthers
Flower B : Anthers withered, no pollen left. Stigma fully developed and now able to receive pollen

12. Wind pollination – grass flowers
Large feathery stigma
Small dull petals
Large droopy stamens
Light powdery pollen cells

13. Wind pollination – catkins
Anthers
Stigma of female flower
Cluster of male flowers

14. Large Small Bright Dull No Yes Yes No Upright Droopy Sticky/ Spiky
Flower part
Insect pollination
Wind
pollination
Petal size
Petal colour
Scent
Nectary
Stamens
Pollen
Stigma
Large
Small
Bright
Dull No
Yes
Yes No
Upright
Droopy
Sticky/ Spiky
Light/powdery
Inside flower
Sticks out

15. Fertilisation of flower egg cells
Spiky pollen cell germinating the on stigma
Pollen tube
Egg cell about to be fertilised by pollen cell nucleus
Ovary

16. Fruit formation Fertilised flower Petals, stamens, and stigma wither
Seeds develop inside the swelling ovary

17. Seed structure
Testa seed coat
Cotyledons food store
Embryo

18. Seed germination
First leaves
Radicle first root
Plumule first shoot

19. Seed dispersal - animals
Oak
Strawberry
Cleaver

20. Seed dispersal wind
Clematis
Dandelion
Sycamore

21. Seed dispersal - self
Poppy
Geranium
Lupin

22. Year 7 Flowering plant reproduction The end
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