Next homework set is here. We are currently up to #23. Use the vacation to work on your Battling Beaks Project. I have attached the instructions again. You should have your data sheet in your notebook along with your graph. #18 Write an observation and an inference from your daily life #19 Imagine that no species ever became extinct. Do you think there would be more, less or the same amount of diversity of life forms on our planet? Explain. #20 Propose what might have caused the changes trough time shown on your timeline. Explain #21 Who was Charles Darwin? What was his theory of evolution? What is natural selection? #22 Why do you think earthworms are beige and not green #23 lab write up 96 #24 Cheetahs are very fast. They are endangered. The few left do not show much variation within the species. How does this help explain why they are endangered? 97 #25 use time to work on battling beak lab 98 #26 how do studies of extinct and modern skeletons provide evidence about how species are related 99 #27 Why doesn’t students’ physical appearance provide enough information to classify animals scientifically? 100a #28 Why it is not accurate to say that humans evolved from lizards? 100b Battling Beaks Project #3 Mrs. Kojes MATERIALS Due- January 4th 2013 plastic forks with 1 tine plastic forks with 2 tines plastic forks with 4 tines plastic cups 1 number cube 1 flat tray or large bin 1/2 cup of “wild loops” ( any loop-shaped cereal) Prediction- Do you think that all three forkbird types will be equally successful at gathering food? Why or why not? Lab write-up- what you did, how you did it and incorporate a discussion of your results. Include a graph of the class data for each type of forkbird over many generations. You can plot the data for all three types of forkbirds on a single graph. Be sure to title your graph, label the axes, and provide a key. Include the answers to the following questions in your essay on this lab. 1. Which type of forkbird was initially the most common? 2. What happened over the generations? 3. Which type of forkbird would you consider the most successful? 4. In what way(s) was your prediction similar to the class results? In what way(s) was your prediction different? What could explain the difference(s) between your prediction and the data we collected? 5. What is the source of the physical variation in the forkbird population? 6. How does (inheritable) variation arise in any population? 7. Why must variation be present in the population in order to simulate natural selection? 8. If a forkbird broke one of its tines (or if a real bird chipped its beak), and then reproduced, what would its offspring look like?