Assignment Part 1 1. What would be the percentage of the non-singing trait in female birds in Generations 4 and 5 if this pattern continues?

2. In which generation will there be almost 100% non-singing females if there are no changes in the birds’ environment and interactions?

3. In what possible scenario would the female birds evolve to having the singing trait?

Assignment part 2
1. Explain why an increase in precipitation and in the number of nearby factories has a greater impact on the occurrence of the mariflowers than changes in temperature, length of day, and invasive species.

Assignment Part 3
1. How did the occurrences of the different traits change over the 30-year period? Use evidence from the graph to support your answer. Using what you know about natural selection and adaptation, what generalization can you make based on these changes?

2. What might be the correlation between the clarity of the lake water and the occurrence of the full body plate trait? What might you conclude about the clarity of the water from 1950 to 1980 based on this correlation?
3. Both the full body plate type and the half body plate trait are also present in an ocean near the lake. Where would you expect a higher occurrence of the full body plate trait, in the lake or the ocean? Explain your answer

4. The clarity of lake water is affected by the amount of phytoplankton (marine plants), soil, clay, and other solids suspended in the lake. Suppose the concentration of carbon dioxide in the atmosphere changed from 340 ppm to 380 ppm from 1980 to 2005. What effect would this have on the occurrence of the full body plate trait? Explain your answer. Hint: Think about how carbon dioxide is related to photosynthesis.