 1. Why can bacteria evolve just like we can?  2. Why do bacteria become antibiotic resistant?  3. In a population, 14% of the population should the dominant allele. What percent age of the population has the recessive allele? 3/16 Daily Catalyst Pg. 32 DNA Similarities

 Evolution test on Thursday  Review day on Wednesday  Study guide due test day  Evolution debate on Friday  Class Point reward on Friday  Finish Lion King?? 3/16 Daily Catalyst Pg. 32 DNA Similarities

 Daily Catalyst  Class Business  Finish evolution of bacteria  DNA similarities notes  Comparative embryology project 3/16 Daily Catalyst Pg. 32 DNA Similarities

 We will be able to evaluate given data sets that illustrate evolution as an ongoing process.  Essential knowledge:  Populations of organisms continue to evolve 3/16 Daily Objective

 A strategy being considered for use in hospitals called cycling. The idea is simple: doctors in a hospital would cycle through antibiotics, prescribing a particular antibiotic for period of time and then switching to a new one. Researchers and clinicians thought that cycling would reduce levels of antibiotic resistance because the bacteria would not have time to evolve to keep up with the changing drugs — just as a resistant strain for Drug #1 evolves and spreads, along comes Drug #2, and strains resistant to Drug #1 no longer have any advantage.  Key Point #4: What is a solution to antibiotic resistance? What can we do?

What is your opinion?

 Worksheet:  PBS video clip  on6/act1.html on6/act1.html

 Directions: Complete the book work on bacteria resistance. Your ws is due Wednesday  Noise: 1 (with partner)  Time: 10 minutes Work time

 Explain how factors affect gene frequency in a population over time and the DNA similarities among organisms. 3/16 Daily Objective

Darwin’s evidence Pg. 26 Fossils Comparative anatomy Biogeography DNA Similarities Classification

 Read page. 262 section titled, Molecular Biology  Answer the following questions:  1.Where does anatomical homology fail?  2.The greater the number of sequence differences, ___________  3. What is homology?  4. How does the concept of homology relate to molecular biology?

 Key Point #1: DNA is your genetic information (genes)  Your DNA determines what is on the inside and the outside (the traits)  Genotypes and phenotypes  Genes and physical expression of genes  For example:  predisposition to cancer or eye color

Do all cells contain the same DNA? No, all cells have the same building blocks, but the building blocks are arranged in different orders to give us variety. Turn and Talk

 Humans and Chimps share the same basic building blocks like the nucleotides- A,T,G, and C  Just arranged in different orders

 Key Point #2:  The more DNA two organisms share in common, the more closely related they are.

 Why are homologous structures evidence for evolution?  Homologous structures are evidence that homologous organisms share a common ancestor Stop and Jot

Who do we get our DNA from? If different organisms have similar DNA, then they… Key Point #3: If two organisms have homologous structures  They SHARE A COMMON ANCESTOR!

 Humans share a large portion of their DNA with other mammals. This strong correlation is evidence that humans and other mammals are closely related. For example…

What percentage of DNA does Mrs. Ireland share with her siblings? 99.9%

What percentage of DNA does Mrs. Ireland share with other humans? 98%

What percentage of DNA does Mrs. Ireland share with other mammals? 87%

What percentage of DNA does Mrs. Ireland share with other organisms? 81%

What percentage of DNA does Mrs. Ireland share with plants? 30%

 Why is DNA used as evidence for evolution?  DNA is a valid piece of evidence for evolution because we can use DNA sequencing to determine similarities and differences between species. DNA can also account for structural similarities seen in organisms. For species that have a common ancestor and have recently undergone evolution to form a new species, will share more DNA with one another. Final thought- Turn and Talk

 Practic e Time!

 Which layers are the same age?

 What type of structure is shown below?

 Which layer is older, A or D?

 What type of structure is shown below?

 We can look at the similarities among species and determine they must have the same ancestor since they same building blocks. Why is DNA evidence for evolution?

 Directions: Read the pre-reading and answer the questions. the Using the hints, complete the DNA similarity project. The graph needs to be glued into your notebook on Page 33.  Time: 15 minutes  Noise: 1 (with partner) Comparative Embrology Project

 1. What is DNA?  2. If two organisms have little to no DNA similarities, what can we say about their relation?  3. Why are homologous structures evidence for evolution?  4. Use the diagram to explain the similarity between Human and Zebras. Name Exit Ticket #7

 Rules of the debate:  One side speaks at time  Interrupting one another will lead to the lose of points  No swearing or offensive terms by ANYONE  The audience may ask questions and comment by raising their hand  You must include facts and a well written argument Debate