Do Now (Day 5 of 5) Please enter silently Sit in your assigned seat Put your technology away until it is Independent Practice time Take out your travel journal and make me proud. I will see you on Thursday!

Module 10 Day 5 of 5 Evidence of Evolution *All of today’s notes will help you during the Independent Activities!!!!

Darwin’s 5 Points of Natural Selection Slide 1 of 7 ALL 5 conditions are required in order to support the evidence of evolution. Population has phenotypical variations. Not every organism has the same genotype so they do not have the same phenotype. Some variations are favorable. The organism’s environment will prefer one phenotype over the others. More offspring are produced than survive.

Darwin’s 5 Points of Natural Selection Slide 2 of 7 ALL 5 conditions are required in order to support the evidence of evolution. 4) Those that survive have favorable traits. The offspring will inherit the traits that allowed the organism to survive its environment. 5) A population will change over time. As generations pass, the organisms will shift to the phenotype that has the most advantages to its environment. But be careful! If the environment changes, those that had the advantage may not survive.

Anatomical Structures- Homologous Slide 3 of 7 If organisms share similar structures, this helps to argue that they are evolutionarily related. Structures with a similar bone arrangement are called homologous structures. Remember, “homo” means same. A similar bone arrangement, even if the functions are different, supports evolution from a common ancestor. All structures with the same color are homologous!

Anatomical Structures- Analogous Slide 4 of 7 Structures that perform the same function (ex. flying) but are very different anatomically (ex. bird wing vs. butterfly wing) are called analogous structures.

Anatomical Structures- Vestigial Slide 5 of 7 Vestigial structures are not functional in that organism, but may represent a link to a previous ancestor. Examples: Whales have a pelvis, but no legs to connect the pelvic bone to. WHY???? Humans have wisdom teeth… but we don’t need them. WHY???

Genetic Resistance*on the test Slide 6 of 7 Farmers use pesticides, like DDT, to eliminate insects and pests, like mosquitos. In a population of insects, some individuals will have a natural resistance to certain chemicals. When those chemicals are used, the individuals with genetic resistance will survive and reproduce, which passes this resistance to the next generation. Over time, more individuals are born with this immunity, making the pesticide useless.DDT effect on insects

Slide 7 of 7 Antibiotics are drugs that fight bacterial infections. Within any population there is genetic variation. In the case of antibiotic resistance, some bacteria are genetically more resistant to the antibiotic than other bacteria. If the amount of antibiotic delivered is too low or the full course not completed, only those least resistant will die. The surviving, resistant bacteria will reproduce. With future applications of antibiotics the population is selected to become more and more resistant. The overuse of antibiotics has led to many resistant strains of bacteria.

Independent Practice- due Today Darwin’s Natural Selection Worksheet. Complete the worksheet using your notes. I have filled out some of the answers for you. Evidence of Evolution: homologous, analogous, and vestigial structures Worksheet. Complete both sides of the worksheet using your notes. Today ONLY! Extra credit if you finish both worksheets and then draw a scenario (with at least 3 pictures) where genetic resistance occurs. Explain what is occurring in each picture.