Post on 06-Apr-2017
1 of 34 © Boardworks Ltd 2007
Spreading seedsWill it grow?Making new plants Circle of lifeReview
Con
tent
s Life cycles
1 of 34 © Boardworks Ltd 2007
2 of 34 © Boardworks Ltd 2007
Look at these plants…
How did they grow their fruits?
What will happen to them?
Why are they important?
Spreading seeds
3 of 34 © Boardworks Ltd 2007
Spreading seeds
4 of 34 © Boardworks Ltd 2007
Spreading seeds
5 of 34 © Boardworks Ltd 2007
Spreading seeds
6 of 34 © Boardworks Ltd 2007
Spreading seedsP
lena
ry
6 of 34 © Boardworks Ltd 2007
7 of 34 © Boardworks Ltd 2007
Con
tent
s
Spreading seedsWill it grow?Making new plants Circle of lifeReview
Life cycles
7 of 34 © Boardworks Ltd 2007
8 of 34 © Boardworks Ltd 2007
After seeds have been dispersed they start to grow a tiny root and a tiny shoot. We call this germination.Seeds will only germinate under certain conditions…
What do you think a seed really needs to germinate?Water? Light? Warmth?
Let’s plan a test to find out!
No! I refuse to start growing unless I have my own dressing room, all
my favourite foods, a personal assistant...
Will it grow?
9 of 34 © Boardworks Ltd 2007
Will it grow?
10 of 34 © Boardworks Ltd 2007
Will it grow?
11 of 34 © Boardworks Ltd 2007
Will it grow?
12 of 34 © Boardworks Ltd 2007
Will it grow?P
lena
ry
12 of 34 © Boardworks Ltd 2007
13 of 34 © Boardworks Ltd 2007
Con
tent
s
Spreading seedsWill it grow?Making new plants Circle of lifeReview
Life cycles
13 of 34 © Boardworks Ltd 2007
14 of 34 © Boardworks Ltd 2007
Let’s take a closer look at the different parts of this flower.
The stigma issticky to keep holdof the pollen.
The stylesupports the stigma and connects it tothe ovary.
The ovary is where the ovules, or eggs, are.
The anther is thepart that makes the pollen.
The filamentholds up theanther.
The petals attract insects.
The sepal leaves protect the flower before it opens.
Making new plants
15 of 34 © Boardworks Ltd 2007
There is something special about this flower; do you know what it is?
The flower has both male and female organs!
The stigma, style and ovary make up the female organ. This is called the carpel.
The anther and filament make up themale organ. This is called the stamen.
Making new plants
16 of 34 © Boardworks Ltd 2007
Making new plants
17 of 34 © Boardworks Ltd 2007
Insects are attracted to flowers by their bright colours, lovely smell and sweet tasting nectar.
Pollen from the stamen sticks to the insects and gets carried to other flowers. Pollen brushes off the insect and onto the carpel.
This is the process of pollination. Let’s see it in action!
Although they have male and female parts, flowers need to spread their pollen around to reproduce.
Making new plants
18 of 34 © Boardworks Ltd 2007
Making new plants
19 of 34 © Boardworks Ltd 2007
The pollen gets stuck on the stigma. Then, the pollen grows atube down to the ovary. Fertilisation can now take place.
Making new plants
20 of 34 © Boardworks Ltd 2007
Ple
nary
Making new plants
20 of 34 © Boardworks Ltd 2007
21 of 34 © Boardworks Ltd 2007
Con
tent
s
Spreading seedsWill it grow?Making new plants Circle of lifeReview
Life cycles
21 of 34 © Boardworks Ltd 2007
22 of 34 © Boardworks Ltd 2007
Circle of life
23 of 34 © Boardworks Ltd 2007
Circle of life
24 of 34 © Boardworks Ltd 2007
Circle of life
25 of 34 © Boardworks Ltd 2007
It is important for animals and plants to reproduce. If they stopped reproducing, what do you think would happen?
I’m a dodo bird. You might not have heard
of me because my species died out over 300 years ago. We used to roam free on our very own island but
then sailors discovered the island. They ruined our home and killed us for food. There weren’t many
of us left to reproduce and so we sadly became
extinct.
Circle of life
Eventually they would all die out.