Plant Reproduction
Ferns, Mosses and Liverworts
Flowers are the reproductive organs of
angiosperms – the dominant terrestrial
vegetation today
Structure and function of the flower
stigma
anther
style
stamen
filament
ovary
ovule
petal
sepal
peduncle
receptacle
carpel
Flower Structure Quiz
• What is the name of the structure labelled X in the diagram?
A.
carpel
B.
sepal
C.
stamen
D.
peduncle
X
Flower Structure Quiz
• Where is pollen made?
A.
stigma
B.
sepal
C.
anther
D.
ovary
Flower Structure Quiz
• Where is the ovule found in a flower?
Flower Structure
Pollination
A.
petals
B.
style
C.
nectary
D.
ovary
Fertilisation
Seed Dispersal
Germination
Test
Flower Structure Quiz
• Which parts of the flower are labelled below:
X
A.
X = style, Y = stigma
B. X = filament, Y = anther
Y
C. X = stigma, Y = style
D. X = anther, Y = filament
Pollination
The pollen grain contains the male sex cell (gamete)
Pollination is the transfer of pollen from the anther to
the stigma
Male gamete is contained within a pollen
grain.
The hard outer coating protects them
both physically and from desiccation.
Pollen can be carried between flowers by insects or by
wind
Wind-pollinated flowers are different in structure to insect
pollinated flowers as they do not have to attract insects to
them but do need to be exposed to the wind.
Pollen grains are very
small and light. They
occur in very large
numbers
Anthers are exposed to the
wind so that pollen can easily
be blown away
Stigmas are
feathery to catch
pollen carried in
wind
Petals are small
and green as
there is no need
to attract insects
Flower Structure
No scent or nectary
Pollination
Fertilisation
Seed Dispersal
Germination
Test
Insect-pollinated flowers are adapted to attract insects to
enable the 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
Flower Structure
Pollination
Brightly coloured
petals
Fertilisation
Seed Dispersal
Germination
Test
Eggs are enclosed and
protected within an ovary.
After fertilisation of the egg the
embryo develops inside a
structure with food reserves
and a protective coat.
Angiosperms have formed successful
relationships with animals
And also the
wind
Pollination Quiz
• Pollination is the transfer from….?
A.
stigma to anther
B.
style to stamen
C.
ovule to filament
D.
anther to stigma
Pollination Quiz
• Two mechanisms for pollination are?
A.
Wind and water
B.
Insect and wind
C.
Insect and water
D.
Wind and birds
Pollination Quiz
• Contains food to support initial embryo plant growth
A.
Testa
B.
Radicle
C.
Cotyledon
D.
Plumule
Pollination Quiz
• Flowers are adapted for wind-pollination by…
A.
Having bright petals and a scent
B.
Having a nectary
C.
Having feathery stigmas
D.
Having sticky stigmas