Transcript The Life Cycle of Flowering Plants

PLANT REPRODUCTION
Plants Reproductive Structures
• Cones: Gymnosperms
– Female cones contain the ovules which
contains the egg cell
– Male cones contain pollen which are like
sperm cells
• Flowers: Angiosperms
– Pistil: female part of flower
– Stamen: Male part of flower
Pollination
• Insects visit
flowers to search
for nectar –
their food.
• But the flowers use
the insects for
their own purposes!
• As the insect probes
for nectar, its body
rubs against the
stamens.
• Pollen gets stuck on
the insect’s legs.
• You can often see bees
with a heavy load of
yellow pollen on their
hind legs.
Pollination
When the insect
visits another
flower of the same
type, the pollen will
stick to the pistal.
This is called
pollination.
Fertilization
The pollen travels
to the ovary, where
it joins with an
ovule.
This is called
fertilization.
Seeds
• Seeds: the
fertilized egg
• Seed Structure:
– Seed coat: protects
plant
– Young plant
– stored food
Types of Seeds
Types of Seeds
Seeds
• The seeds develop
inside the ovary,
which grows to
become the seed
pod or fruit.
Seed Dispersal
• The seeds are
dispersed by:
–
–
–
–
Animals
Wind
Explosion
Water