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

1. Eye color is a ___ variation.2. Skin color is a ___ variation. 3. ___ is any variation that makes an

organism better suited to its environment.4. Variations of adaptation can include an

organism’s color, ___, behavior or chemical makeup.

smalllarge

Adaptation

size

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 landb. Separation of groups

c. Food supply

Do Now

1. A ___ is something that can be tested.

2. A ___ is something that can be tested by evidence to explain a natural phenomenon.

3. A ___ can be incorrect. (more than one word answer)

4. Can there be more than one theory? (yes or no)

hypothesis

theory

Hypothesis and a theory

theories are not based on facts.

Yes because

5. Examples of theories of how humans were created:

Show video on ted camel. 5:20 – 10:50 (5min) and 12:20 – 15:50 (3 min)

Intelligent Design TheoryTheory of EvolutionAncient Astronaut Theory

Do Now1. How did camels become the perfect

machine in the desert?

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?

Through adaption over time, the camel evolved with features to help it survive.

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 NowIdentify 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.

2. Both parents’ tails are curved therefore the offspring is likely to be curved.

Acquired characteristics which is untrue

Inherited characteristicsCan be true

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.

Acquired characteristics which isuntrue

Acquired characteristicswhich is untrue

Do Now

1. ___ - better traits that are suitable for the environment are more likely to survive and pass on.

2. ___ -desirable traits are made to be passed on.

3.

Natural selection

Artificial selection

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 ___ 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:

artificial

b. Farming animals and plants a. Domesticating pets

c. Making new drugsand

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

videoshttp://learn.genetics.utah.edu/content/variation/artificial/ (8min)

http://www.teachertube.com/viewVideo.php?video_id=214865 (2min)

http://www.sophia.org/artificial-selection/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 ___ different species.

2. ___ selection is that organisms which survive in an environment will reproduce pass down their traits.

3. ___ makes one member of a species different from other members of the same species.

4. Examples: eye color,

height, etc

twoNatural

Variation

ear lobe shape,

Do Now

1. Eye color is a ___ variation.2. Skin color is a ___ variation.3. __ is any variation that makes an

organism better suited to its environment.4. Variations can involve an organism’s color,

___ , behavior or chemical makeup.

smalllarge

Adaptation

shape

Do Now- write #2 and #31. What is the benefit in having

variations in animals? Through ___ 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 ___ amount of water and sunlight.

competition

same

3. The two ways that species can adapt to their environment are camouflage and mimicry. Camouflage is an organism blending to its ___ while mimicry is an organism that blends with a second ___ .environment

organism

Mutations linkshttp://listverse.com/2013/02/25/10-amazing-animal-mutants/

http://psycheskinner.hubpages.com/hub/Unusual-Animals