Do Now- Adaptations Over Time
1. List two differences between an Alaskan
husky dog and a Mexican Chihuahua.
2. Why do you think these differences are
needed?
3. What do you think lead to these different
features of the canine family?
Do Now
small variation.
1. Eye color is a ___
2. Skin color is a large
___ variation.
3. Adaptation
___
is any variation that makes an
organism better suited to its environment.
4. Variations of adaptation can include an
organism’s color,size
___, behavior or
chemical makeup.
Do Now- Adaptations Over Time
1. List two differences between an Alaskan
husky dog and a Mexican Chihuahua.
1a. Thick fur for winter.
short hair for summer.
1b. Long legs for walking in snow.
Short legs for digging ground.
1c. Big bodies for pulling sleighs.
Small bodies for going underground.
2. Why do you think these differences are
needed?
2a. Their body sizes give them different job
roles.
2b. Physical features are needed to adapt to
their environment.
3. What do you
think lead to
these different
features of the
canine family?
a. Migration to
other land
b. Separation of
groups
c. Food supply
Do Now
1. A hypothesis
___
is something that can be
tested.
2. A theory
___
is something that can be
tested by evidence to explain a natural
phenomenon.
and a theory can be
3. A Hypothesis
___
incorrect. (more than one word answer)
4. Can there be more than one theory?
(yes or no) Yes becausetheories are not
based on facts.
5. Examples of theories of how humans were created:
Intelligent Design Theory
Theory of Evolution
Ancient Astronaut Theory
Show video on ted camel.
5:20 – 10:50 (5min) and 12:20 – 15:50 (3 min)
Do Now
1. How did camels become the perfect
machine in the desert?
Through adaption over time, the camel
evolved with features to help it survive.
2. What happened to the wooly mammoth
and saber tooth tiger?
3. Why is the komodo dragon (dated 3.8
million years ago) still alive?
2. What happened to the wooly mammoth and
saber tooth tiger?
They no longer exists because they possibly did
not adapt to their environment.
Wooly mammoth
Saber tooth tiger
3. Why is the komodo dragon (dated 3.8 million
years ago) still alive?
It possibly adapted to its environment and
did not need to be evolved.
Do Now
Identify each statement as Lamarck’s hypothesis of
acquired characteristics or inherited characteristics.
1. The tails of rats are amputated so their
offspring will have no tails.
2. Both parents’ tails are curved therefore the
offspring is likely to be curved.
3. I am knowledgeable because I read therefore
my children will be knowledgeable.
4. If I cut my hair then my children will have
short hair.
1. The tails of rats are amputated so their
offspring will have no tails.
Acquired characteristics which is
untrue
2. Both parents’ tails are curved therefore
the offspring is likely to be curved.
Inherited characteristics
Can be true
3. I am knowledgeable because I read
therefore my children will be knowledgeable.
Acquired characteristics which is
untrue
4. If I cut my hair then my children will have
short hair.
Acquired characteristics
which is untrue
Do Now
1. Natural
___ selection - better traits that are
suitable for the environment are more
likely to survive and pass on.
selection -desirable traits are
2. Artificial
___
made to be passed on.
3.
Identify which these statements as “artificial
selection” or “natural selection”.
3. Cows are bigger in size so there is more meat
and milk for us.
Artificial selection
4. Nicotene in tobacco has been produced more
to make smokers more addictive.
Artificial selection
5. Male birds are brightly colored to attract
mates.
Natural selection
6. Horses have become stronger in order to run
faster on the racetrack.
Artificial selection
7. The Brassica species produced broccoli,
cauliflower, brussel sprouts, cabbage and kale
gives us a variety of vegetables to eat.
Artificial selection
8. Whales developed flippers and lost their hind
legs to be able to live in the ocean.
Natural selection
3. Cows are bigger in size so there is more meat and
milk for us.
4. Nicotene in tobacco has been produced more to
make smokers more addictive.
5. Male birds are brightly colored to attract mates.
6. Horses have become stronger in order to run faster
on the racetrack.
7. The Brassica species produced broccoli, cauliflower,
brussel sprouts, cabbage and kale gives us a variety of
vegetables to eat.
8. Whales developed flippers and lost their hind legs
to be able to live in the ocean.
Do Now and Notes
1. In artificial
___
selection, humans have an effect
on the evolution of a species rather than
letting nature choose the path of evolution.
2. Four reasons why people use artificial
selection:
a. Domesticating pets
b. Farming animals and plants
c. Making new drugs
and
When is artificial selection used?
•
•
•
•
Domesticated animals such as dogs
Farming crops and animals
Pharmaceuticals (new drugs)
d. Genetic engineering
Pros and Cons
• Pros:
– Humans can manipulate
organisms to benefit
them
– New variations of
organisms can be
produced (example:
cabbage, broccoli,
cauliflower are all
variations of the same
plant)
• Cons:
– Selectively bred
organisms are
susceptible (at risk) to
environmental changes
and diseases
– Inbreeding can become
a problem
– In animals artificial
selection can cause
health problems
videos
http://learn.genetics.utah.edu/content/variatio
n/artificial/ (8min)
http://www.teachertube.com/viewVideo.php?vi
deo_id=214865 (2min)
http://www.sophia.org/artificialselection/artificial-selection--2-tutorial (2.5min)
Do Now
1. If a mountain separated members of a
species then each group will change over
time into ___
two different species.
2. ___
Natural selection is that organisms which
survive in an environment will reproduce
pass down their traits.
3. Variation
___
makes one member of a species
different from other members of the same
species.
4. Examples: eye color, ear lobe shape,
height, etc
Do Now
Eye color is a small
___ variation.
large variation.
Skin color is a ___
Adaptation
__
is any variation that makes an
organism better suited to its environment.
4. Variations can involve an organism’s color,
shape
___ , behavior or chemical makeup.
1.
2.
3.
Do Now- write #2 and #3
1. What is the benefit in having
variations in animals? Through competition
___
animals that have the best traits
survive and pass these traits to their
offspring.
2. What about variations in plants?
There is no variation in plants within
the same species because they share
the same
___ amount of water and
sunlight.
3. The two ways that species can adapt to their
environment are camouflage and mimicry.
Camouflage is an organism blending to its
environment while mimicry is an organism that
___
organism .
blends with a second ___
Mutations links
http://listverse.com/2013/02/25/10-amazinganimal-mutants/
http://psycheskinner.hubpages.com/hub/Unusu
al-Animals