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7. What does tRNA do?
8. What is transcription?
9. What does DNA Polymerase do?
11. What does rough endoplasmic reticulum do?
12. What do chloroplasts do?
13. What does the vacuole do?
14. What do mitochondria do?
15. What are two differences between plant and animal cells?
17. What three things do all cells have in common?
20. Which base is missing in RNA and what is it replace with?
Hi folks,
With that in mind, we also did a very interesting lab today. Using a paper airplane design as a model bird, we explored how random mutations and natural selection could slowly evolve a species into one that is more fit for its environment.
For homework this week please answer the following questions about today's lab. I'll send data in a separate email so you can see a larger sample size. The write up for the lab is on page 314 and 315 in your book if you wish to refer to it. Even if you missed today, I think you can give a good shot at the homework. With the data and the write-up in the book I'm pretty sure you can get a handle on what was going on.
1. What was "selecting" for the successful bird?
2. What represented the "mutations".
3. In each trial you used a "clone" of the previous generation. Why is the term clone appropriate?
4. Is this lab an example of disruptive, directive, or stabilizing selection? (May need to use your notes or the book if you don't recall these terms.) Why do you think so?
5. Did each generation always progress? In other words, did each generation get a farther flyer?
6. How does this lab represent natural selection?
7. In a way, there were three traits that were adapting in order to create a better flyer. Which three traits were involved in this model?
8. Describe two aspects of this investigation that model evolution of biological organisms.
9. How might this lab help explain the observations Darwin made about finches on the Galapagos Islands?
10. How would you say the term "fitness" is represented in this lab?
11. Using this lab, give an example of each of Darwin's four postulates (DIOR). (Hint: one of them actually is not represented in this lab.)
12. How would you alter the lab if the environment this population of birds was in was very very windy, so that if a bird left the ground it may be blown out to sea? What would you change to model this new scenario.
In our neighborhood - close to Duke's West campus - the roads are fine. I am not sure how they will be on Mt. Sinai.We'd be ok with giving it a try.Thanks,Imke NickelsonSent from my iPhoneOn Feb 20, 2020, at 23:33, Jim Mueller <jim@bitesizephysics.com> wrote:Hi all,I'm betting by class time most of the roads will be OK to drive on but, please when you get a chance, let me know if you feel you will be able to make it to class.Thanks!Jim Mueller(919) 907-3217