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

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Presentation on theme: "Year 7 Flowering plant reproduction J.Maden De Lisle Catholic Science College Science department Key stage 3."— Presentation transcript:

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

2 Flowering plant reproduction explorer Click here to see all of the presentation Click here to go directly to plant pollination Click here to go directly to fertilisation Click here to go directly to seeds

3 Plant parts Terminal bud Leaf Lateral bud Stem Tap root Lateral root Leaf stalk

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

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 Anther with top cut off Pollen cells inside pollen sac Filament

8 Flower partJob of part Petals Stamens (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 Flower A : Anthers fully developed and releasing pollen. Stigma not yet developed and unable to receive pollen Ripe anther releasing pollen onto insect Unripe stigma

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

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

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

14 Flower partInsect pollination Wind pollination Petal size Petal colour Scent Nectary Stamens Pollen Stigma Small Large Bright Dull No Yes No UprightDroopy Light/powderySticky/ Spiky Inside flowerSticks out

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

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 Radicle first root First leaves Plumule first shoot

19 Seed dispersal - animals Strawberry Cleaver Oak

20 Seed dispersal wind Clematis DandelionSycamore

21 Seed dispersal - self Geranium Poppy Lupin

22 Year 7 Flowering plant reproduction The end Click here to view again


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