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Plant Reproduction Click to Enter
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Flowers are the reproductive organs of plants
Flower Structure Pollination Fertilisation Seed Dispersal Germination Test
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Flower structure stigma anther style stamen pistil filament ovary
ovule Flower Structure Pollination Fruit Development Seed Dispersal Germination Test
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Flower Structure Quiz carpel sepal stamen peduncle
What is the name of the structure labelled X in the diagram? carpel sepal X stamen peduncle Flower Structure Pollination Fertilisation Seed Dispersal Germination Test
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Flower Structure Quiz stigma sepal anther ovary Where is pollen made?
Flower Structure Pollination Fertilisation Seed Dispersal Germination Test
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Flower Structure Quiz petals style nectary ovary
Where is the ovule found in a flower? petals style nectary ovary Flower Structure Pollination Fertilisation Seed Dispersal Germination Test
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Flower Structure Quiz X = style, Y = stigma X = filament, Y = anther
Which parts of the flower are labelled below: X = style, Y = stigma X X = filament, Y = anther Y X = stigma, Y = style X = anther, Y = filament Flower Structure Pollination Fertilisation Seed Dispersal Germination Test
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Pollination The pollen grain contains the male sex cell (gamete)
Flower Structure Pollination Fertilisation Seed Dispersal Germination Test
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Pollination is the transfer of pollen from the anther to the stigma
This is an example of cross-pollination as the pollen travels from one flower to a different flower. This is desirable in plants as it promotes variation. Flower Structure Pollination Fertilisation Seed Dispersal Germination Test
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Pollen can be carried between flowers by insects or by wind
Flower Structure Pollination Fertilisation Seed Dispersal Germination Test
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Insect-pollinated flowers are adapted to attract insects to them to enable transfer of pollen
Pollen has barbs for hooking onto insect fur nectar and a scent present Anthers positioned to rub pollen onto insects Sticky stigma to collect pollen Brightly coloured petals Flower Structure Pollination Fertilisation Seed Dispersal Germination Test
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Wind-pollinated flowers are different in structure because they do not have to attract insects to them but do need to be exposed to the wind. Anthers are exposed to the wind so that pollen can easily be blown away Stigma are feathery to catch pollen carried on wind Petals are small and dull as there is no need to attract insects No scent or nectary Flower Structure Pollination Fertilisation Seed Dispersal Germination Test
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Self-pollination occurs when pollen falls from the anther onto the stigma of the same flower
Self-pollination is not desirable as it reduces variation Flower Structure Pollination Fertilisation Seed Dispersal Germination Test
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Flowers will prevent self-pollination by either having stigma above stamen or…
Flower Structure Pollination Fertilisation Seed Dispersal Germination Test
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…by having stamen and stigma mature at different times.
Flower Structure Pollination Fertilisation Seed Dispersal Germination Test
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Click on the icons below to view the summary videos on pollination
If the hyperlink does not work then copy and paste this url into a new browser window and you can watch the video then, url: Insect pollination (1 minute) Flower Structure Pollination Fertilisation Seed Dispersal Germination Test
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Pollination is the transfer from….?
Pollination Quiz Pollination is the transfer from….? the stigma to anther style to stamen ovule to filament anther to stigma Flower Structure Pollination Fruit Development Seed Dispersal Germination Test
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The two mechanisms for pollination are?
Pollination Quiz The two mechanisms for pollination are? Wind and water Insect and wind Insect and water Wind and birds Flower Structure Pollination Fertilisation Seed Dispersal Germination Test
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Pollination Quiz Cross-pollination… Increases variation
Decreases variation Is only performed by insects Is only performed by wind Flower Structure Pollination Fertilisation Seed Dispersal Germination Test
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Pollination Quiz Flowers are adapted for wind-pollination by…
Having bright petals and a scent Having a nectary Having feathery stigmas Having sticky stigmas Flower Structure Pollination Fruit Development Seed Dispersal Germination Test
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Fertilisation and Fruit Development
Flower Structure Pollination Fruit Development Seed Dispersal Germination Test
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Once pollination occurs a tube grows from the pollen grain down through the style to the ovule
stigma style carpel ovary ovule Note: Petals not shown in order to simplify diagram Flower Structure Pollination Fruit Development Seed Dispersal Germination Test
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Fertilisation occurs when the male sex cell (pollen) combines with the female sex cell (ovule) and creates a zygote Flower Structure Pollination Fruit Development Seed Dispersal Germination Test
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Watch this short introductory video to review fertilisation (1 minute)
If the hyperlink does not work then copy and paste this url into a new browser window and you can watch the video then, url:
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After fertilisation the petals, stamen and sepals fall off.
The ovule turns into a seed, the fertilised egg (zygote) inside develops into an embryo plant. Cotyledon: Food store Seed coat: Protective layer Embryo shoot Embryo plant Embryo root Flower Structure Pollination Fruit Development Seed Dispersal Germination Test
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The ovary develops to become a fruit.
Fleshy wall of the ovary (yes, you are eating an adapted ovary when you crunch into an apple! seed Flower Structure Pollination Fruit Development Seed Dispersal Germination Test
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