Transcript Do Now
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