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7/31/2019 Plant-reproduction Power Point
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Plant Reproduction
Click to Enter
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INSTRUCTIONS
Ensure that you complete all activities and worksheets when instructed to do so.
The pad icon will indicate when you should fill in your worksheet.
Work your way through the presentation by clicking on the background to moveto the next page or to activate an animation. The mouse icon will indicate that aclick will activate an animation or require buttons to be pressed in the quizzes.
You can navigate around the presentation by using the arrow links that appearwhen you place your cursor on the lower left hand part of the screen.
Some slides have embedded movies which will start when you click on theimage. The video camera symbol tells you when a movie is available. There issound so you may want to wear headphones if people are working near you.
You can return to the home page by clicking on the clickbiology icon.
At the end of the module there is a test that will provide a results page which youwill print off and hand in to your teacher.
The speaker symbol means that there are some audio explanation available forthe slide
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Plant Reproduction Home Page
Flower structure
Pollination
Fruit development
Seed dispersal
Germination
Test
1
2
3
4
5
6
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Flowers are the reproductive organs of plants
Flower Structure Pollination Fertilisation Seed Dispersal Germination Test
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Click image to view a video on plant reproduction
Flower Structure Pollination Fertilisation Seed Dispersal Germination Test
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:
http://vimeo.com/1594037?pg=embed&sec=1594037
http://vimeo.com/1594037?pg=embed&sec=15940377/31/2019 Plant-reproduction Power Point
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Use the diagram below to complete the labels on
the flower structure worksheet
stigma
style
ovary
ovule
carpel
anther
filament
stamen
petal
sepal
receptaclepeduncle
Flower Structure Pollination Fruit Development Seed Dispersal Germination Test
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Complete the functions table by clicking on the
labels to discover their functions
stigma
style
ovary
ovule
carpel
anther
filament
stamen
petal
sepal
receptaclepeduncle
Flower Structure Pollination Fertilisation Seed Dispersal Germination Test
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Flower Structure Quiz
What is the name of the structure labelled X in thediagram?
sepal
stamen
peduncle
carpel
X
Flower Structure Pollination Fertilisation Seed Dispersal Germination Test
Click the correct answer
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Flower Structure Quiz
Where is pollen made?
stigma
sepal
anther
ovary
Flower Structure Pollination Fertilisation Seed Dispersal Germination Test
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Flower Structure Quiz
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
Which parts of the flower are labelled below:
X = filament, Y = anther
X
Y
X = stigma, Y = style
X = anther, Y = filament
X = style, Y = stigma
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 ofcross-pollination as thepollen 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
Click to view the animation
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Pollen can be carried between flowers by insects
or by wind
Use the information in the next two slides tocomplete the table comparing the adaptations of
wind and insect pollinated flowers.
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Insect-pollinated flowers are adapted to attract
insects to them to enable transfer of pollen
Sticky stigma
to collect pollenBrightly
coloured petals
nectar and a
scent present
Pollen hasbarbs for
hooking onto
insect fur
Anthers positioned
to rub pollen onto
insects
Flower Structure Pollination Fertilisation Seed Dispersal Germination Test
Wi d lli d fl diff i
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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.
Petals are small
and green as there
is no need to attract
insects
Stigma are
feathery to catch
pollen carried on
wind
Anthers are exposed to the
wind so that pollen can
easily be blown away
Pollen grains are very
small and light. They
occur in very large
numbers
No scent or nectary
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Self-pollination occurs when pollen falls from the
anther onto the stigma of the same flower
Self-pollination isnot desirable as it
reduces variation
Click to showanimation of self-pollination
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.
Complete the sections in your worksheet describing self-pollination and cross-pollination. Explain the mechanismsemployed by plants to prevent self-pollination.
Flower Structure Pollination Fertilisation Seed Dispersal Germination Test
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Click on the icons below to view the
summary videos on pollination
Flower Structure Pollination Fertilisation Seed Dispersal Germination Test
Pollination (9 minutes)
Insect pollination (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:
http://www.youtube.com/watch?v=bZ3J4UWwd2Q
If the hyperlink does not work then copy and pastethis url into a new browser window and you can
watch the video then, url:
http://www.youtube.com/watch?v=ge3EM8AERV0
http://www.youtube.com/watch?v=bZ3J4UWwd2Qhttp://www.youtube.com/watch?v=ge3EM8AERV0http://www.youtube.com/watch?v=bZ3J4UWwd2Q7/31/2019 Plant-reproduction Power Point
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Pollination Quiz
Pollination is the transfer from.?
the stigma to anther
style to stamen
anther to stigma
ovule to filament
Flower Structure Pollination Fruit Development Seed Dispersal Germination Test
Click the correct answer
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Pollination Quiz
The two mechanisms for pollination are?
Wind and water
Insect and water
Insect and wind
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 wind
Is only performed by insects
Flower Structure Pollination Fertilisation Seed Dispersal Germination Test
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Pollination Quiz
Flowers are adapted for wind-pollination by
Having feathery stigmas
Having a nectary
Having bright petals and a scent
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
Flower Structure Pollination Fruit Development Seed Dispersal Germination Test
stigma
style
ovary
ovule
carpel
Note: Petals not shown in
order to simplify diagram
Click to view the
animation
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Fertilisation occurs when the male gamete
fuses with the ovule (the female gamete)
Complete the
fertilisation
section of the
worksheet
(you will need to
refer to your text
book)
Flower Structure Pollination Fruit Development Seed Dispersal Germination Test
Click to view the
animation
W t h thi h t i t d t id t i
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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:
http://www.youtube.com/watch?v=pVhH2GPlckE
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Seed Dispersal
Flower Structure Pollination Fruit Development Seed Dispersal Germination Test
W t h th id d di l
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Watch the video on seed dispersal
(lasts just under 10 minutes)
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:
http://www.youtube.com/watch?v=zbQ1jWl3AOM
After fertilisation the petals stamen and sepals fall off
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After fertilisation the petals, stamen and sepals fall off.
The ovule turns into a seed, the fertilised egg inside
develops into an embryo plant.
Testa:
tough seed coat
Micropyle:
Hole made by
pollen tubeEmbryo
plant
Cotyledon:
Food store
Plumule:
Embryo shoot
Radicle:Embryo root
Flower Structure Pollination Fruit Development Seed Dispersal Germination Test
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Water leaves the seed, it dehydrates and becomes
dormant because metabolic reactions stop.
The ovary develops to become a fruit.
seed
Fleshy wall
of the ovary
(yes, you are
eating anadapted ovary
when you
crunch into an
apple!
Flower Structure Pollination Fruit Development Seed Dispersal Germination Test
S d d t b di d f th t
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Seeds need to be dispersed away from the parent
plant in order to reduce competition for space,
light, nutrients and water.
Seeds can be dispersed by:
Wind
Water
Mechanical
Animals
Fill in the worksheet on the reasons and mechanisms
for seed dispersal
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Seed dispersal quiz
Which mechanism for dispersal is used by the seedshown in the picture
mechanical
wind
animal
water
Flower Structure Pollination Fertilisation Seed Dispersal Germination Test
Click the correct answer
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Seed dispersal quiz
Which mechanism for dispersal is used by the seedshown in the picture
water
animal
wind
mechanical
Flower Structure Pollination Fertilisation Seed Dispersal Germination Test
Click the correct answer
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Seed dispersal quiz
Which mechanism for dispersal is used by the seedshown in the picture
wind
mechanical
animal
water
Flower Structure Pollination Fertilisation Seed Dispersal Germination Test
Click the correct answer
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Seed dispersal quiz
Which mechanism for dispersal is used by the seedshown in the picture
mechanical
animal
wind
water
Flower Structure Pollination Fertilisation Seed Dispersal Germination Test
Click the correct answer
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Germination
Flower Structure Pollination Fruit Development Seed Dispersal Germination Test
The seed contains the embryo plant and
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Water enters the seedthrough the micropyle
and activates enzymes.
The water also softens
the testa to allow it to
split.
Flower Structure Pollination Fruit Development Seed Dispersal Germination Test
The seed contains the embryo plant and
cotyledons (starch stores)
Plumule
(embryo shoot)
Radicle
(embryo root)
Micropyle
Testa
Cotyledon
Label the diagramof the seed
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Enzymes are used in seed germination
starch
embryo plant
amylase
secreted
maltose
The enzymes break
starch down into
maltose and then
glucose. The glucose
is used in respirationto provide energy for
growth
Plumule
Radicle
This is the first part
to grow out of the
seed as it needs to
absorb more water
Flower Structure Pollination Fruit Development Seed Dispersal Germination Test
Whilst germinating the plant uses food stores in
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Whilst germinating the plant uses food stores in
the cotyledon to provide energy for growth
Flower Structure Pollination Fruit Development Seed Dispersal Germination Test
light
soil
germination
Plant growth and development
The seedling can nowphotosynthesise and
make its own food
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Changes in dry mass of the germinating seed:
Seed loses weight as it uses
up starch stores in thecotyledons as the seedling
cannot photosynthesise yet
Flower Structure Pollination Fruit Development Seed Dispersal Germination Test
Days
Dry mass/g
Dry mass is the
mass of solid
matter with allwater removed
Weight increases as
the seedling can
photosynthesise and
plant grows
Answer the
question on theworksheet
Click to
listen to an
explanation
Conditions required for germination
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Conditions required for germination
Summarise the findings of the experiment shown below:
Flower Structure Pollination Fruit Development Seed Dispersal Germination Test
4oC
A
moist moist moist moistdry
Warm
BWarm
CWarm
D
Warm
E
Oxygen
present
Oxygen
present
Oxygen
present
Oxygen
present
No
oxygen
No light
Pyrogallol (absorbs oxygen)Click to
listen to an
explanation
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END
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