Year 7 Flowering plant reproduction J.Maden De Lisle Catholic Science College Science department Key...
-
Upload
chaz-gedman -
Category
Documents
-
view
218 -
download
1
Transcript of Year 7 Flowering plant reproduction J.Maden De Lisle Catholic Science College Science department Key...
Year 7 Flowering plant reproduction
J.Maden
De Lisle Catholic Science CollegeScience department
Key stage 3
Flowering plant reproduction explorer
Click here to see all of
the presentation
Click here to godirectly to plant
pollination
Click here to go directly to
fertilisation
Click here to go directly to
seeds
Plant parts
Terminal bud
Leaf
Lateral bud
Stem
Tap root
Lateral root
Leaf stalk
Ovaries Anthersfemale reproductive parts male reproductive parts
egg cells pollen cells
one egg cell one pollen cell
Embryo Plant
Cell division
Fertilisation (nuclei join)
Seed
Sexual reproductionin plants
Cell division
Cell division
Cell division
Parts of a flowerPetals
Stamens
Carpel
Sepals
Stalk
Female flower parts - carpel
Stigma
Style
Ovary containing egg cells
Male flower parts - stamen
Anther with top cut off
Pollen cells inside pollen sac
Filament
Flower part Job 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
Pollen cells
Sticky pollen
Spiky pollen
Air sac on pollen cell
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
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
Wind pollination – grass flowers
Large feathery stigma
Small dull petals
Large droopy stamens
Light powdery pollen cells
Wind pollination – catkins
Anthers
Cluster of male flowers
Stigma of female flower
Flower part Insect pollination
Wind
pollination
Petal size
Petal colour
Scent
Nectary
Stamens
Pollen
Stigma
SmallLarge
Bright Dull
NoYes
Yes No
Upright Droopy
Light/powderySticky/ Spiky
Inside flower Sticks out
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
Fruit formation
Fertilised flower
Petals, stamens, and stigma wither
Seeds develop inside the
swelling ovary
Seed structure
Testa seed coat
Cotyledons food store
Embryo
Seed germination
Radicle first root
First leaves
Plumule first shoot
Seed dispersal - animals
Strawberry
Cleaver
Oak
Seed dispersal wind
Clematis
Dandelion Sycamore
Seed dispersal - self
GeraniumPoppy
Lupin
Year 7Flowering plant reproduction
The end
Click here to viewagain