Everything%20you%20need%20to%20know%20about%20flowers!

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Everything you need to know about flowers!
Ann Morris, Science Advisory Teacher, PPEC,
29.4.02
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The Life Cycle of Flowering Plants

• The life cycle shows the main stages in the life
  of a flower, from seed to flower and to seed
  again.
• This is the process of reproduction.

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Why are some flowers so colourful?

• Many flowers have brightly coloured petals and an
  attractive scent.
• This is so that they attract bees and other
  insects.

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What does a flower do?

• The main function of a flower is to reproduce and
  make new seeds so that new plants will grow each
  year.

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• If you look carefully at a flower, you will see
  that it is made up of many different parts.

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• Each part has an important job to do.

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Sepals
sepal

• The sepals protect the flower before it opens.

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Petals

• The petals attract pollinating insects with their
  bright colour and attractive scent.

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Stamens

• The stamens are the male part of the flower.
• The plant makes pollen in the top part of the
  stamen, called the anther.

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The Stigma
stigma

• The stigma is the top of the female part of the
  flower.
• The pollen from another flower collects on the
  stigmas sticky surface.

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The Ovary

• The ovary protects the ovules.
• Pollen travels to the ovules and fertilization
  takes place.
• Now the ovules will develop into seeds.

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Write the correct words in the boxesstamens,
stigma, petals, ovary, sepals
Write the correct words in the boxesstamens,
stigma, petals, ovary, sepals
pollen sticks to this
where the seeds grow
these attract insects
where the pollen is made
These protect the flower before it opens
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Pollination

• Insects visit flowers to search for nectar
  their food.
• But the flowers use the insects for their own
  purposes!

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• As the insect probes for nectar, its body rubs
  against the stamens.
• Pollen gets stuck on the insects legs.
• You can often see bees with a heavy load of
  yellow pollen on their hind legs.

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Pollination

• When the insect visits another flower of the
  same type, the pollen will stick to the stigma.

This is called pollination.
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Fertilization

• The pollen travels to the ovary, where it joins
  with an ovule.

This is called fertilization.
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Seeds

• The seeds develop inside the ovary, which grows
  to become the seed pod or fruit.

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Seed Dispersal

• The seeds are dispersed some by animals, some by
  the wind, some by explosion and some by water.

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Germination

• If the seed lands in a suitable place, it will
  germinate, and grow into a new plant.
• Then the cycle starts all over again.

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Write these words in the boxes germination,
fertilization, pollination, seed
dispersal, parent plant, plant growth
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Write the correct words in the boxesstamen,
stigma, petals, ovary, ovules, pollen, sepals,
anther.
This is the female part of the flower, which
receives the pollen
The male part of the flower
These attract insects
This is where pollen is made
Insects carry this from flower to flower
These protect the flower before it opens
These become seeds after fertilization
This is where the seeds will grow