Transcript Flower Structure & Gamete formation ppt

Sexual Reproduction in
Flowering Plants
a) Flower Structure & Gamete
Formation
Learning objectives
(1/4)
•
State the structure & function of the floral
parts including: Sepal, petal, stamen, carpel)
•
State that the Pollen grain produces male
gamete.
•
State that the Embryo sac produces an egg
cell & polar nuclei.
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Structure of the flower
Structure of the flower
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Structure of the flower
Petal
Stigma
Style
Anther
Carpel
Ovary
Stamen
Filament
Sepal
Ovule
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Function of floral parts
• Sepal : To protect
the flower (and to
prevent it from
drying out
• Petals : To attract
insects to the flower
for pollination
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Function of floral parts
• Stamen : To produce
the pollen grains in
the anthers. (Each
pollen grain
produces two male
gametes, one of
which can fertilise an
egg cell)
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Function of floral parts -Stamen
Anther
• Produces pollen
Filament
• Holds the anther in
place
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Function of floral parts
• Carpel : To produce
the ovules (Each
ovule contains an
egg cell inside an
embryo sac)
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Function of floral parts - Carpel
Stigma
• Where pollen lands
after pollination
Style
• Pollen travels
down this
Ovary
• Contains ovules
&eggs)
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Click below to go to the next stage in
the life cycle
Pollination & Fertilisation
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Thanks to PDST biology team
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