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Year 7 Flowering plant reproduction J.Maden

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Presentation on theme: "Year 7 Flowering plant reproduction J.Maden"— Presentation transcript:

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
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 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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