1) Evolution is the process of change over many generations where organisms become better suited to their environment or more likely to die out. 2) Natural selection and adaptation are key mechanisms of evolution, where traits that help organisms survive and reproduce are passed on while others die out. 3) Charles Darwin first developed the theory of evolution to explain how organisms change over time through natural selection and adaptation.

1. What is EVOLUTION?
The idea of evolution is a simple one. Things change.
The process of cars changing over the past 100 years can be thought of as
an evolution in engineering.
When an organism changes over many generations, it might be better suited to live, or
more likely to die.

3. 1. We have common ancestors.
2. We share common traits.
Embryonic development -
before all structural
stages.

4. bacteria
amoeba
protozoa

5. Jelly Fish
sponges
protozoa
Green Alge
PLANTS
ANIMALS

6. Green Algae
Green Moss
Ferns
PLANTS

7. Jelly Fish
worms
Molluscs
Snails,
shells
spiders crabs
insects

8. sponges
worms
starfish
Sea
squirts

9. Sea
squirts
fishes
Amphibians -
frogs
birds
reptiles
mammals

10. How does EVOLUTION HAPPEN?
1. Natural Selection – Survival of the fittest
2. Adaptation – Changing their behaviour, body
structure, traits etc.
3. Overproduction of offspring – produce large no: of
children.

11. 1. Natural Selection
Sometimes you've got a skill that helps you survive; sometimes you don't.
If you were a 500 pound bird with little tiny wings and little tiny legs, chances are you
wouldn't move around too well. One day you might run out of food and die. Oh well,
you were just selected for extinction.

12. Guess who……
I am a bear, and I moved to
a very cold region. What
did I evolve into?
POLAR BEAR

13. I am from the deer
family, and I couldn’t
reach leaves on the
tree. I kept stretching
my neck. What did I
evolve into?
GIRAFFE

14. I am a small bird, and I
couldn’t reach inside the
flowers where in live. I
adapted my beak. What did I
evolve into?
HUMMING BIRD

15. PEPPERED MOTH

16. In the dessert, there is not
much water and I can’t grow
properly. On top of it animals
eat my leaves… so how do I
adapt?
CACTUS - thorns

17. Everyone finds me easily and
then eats me. I have to do
something to hide…
What did I do?
CHAMELEON –
can change
colours

18. Charles Darwin is the first person to come up with the Theory of Evolution.

19. monkeys
monkeys
apes orangutan gorilla
chimpanzees man