Question

Chapter 13 Post Lecture - Attempt 1 Scientific Thinking: What Clues About Biology Might Road Kill Provide? Hypothesis Data collected Hypothesis supported? Avian scavengers did not increase during this time, and terrestrial scavengers probably did not increase 1. Traits that help individuals avoid being hit by cars have evolved through natural selection in the cliff swallow population. Group 1 Group 2 The wing shapes of swallows killed on roads differ from those of the general population. Car traffic stayed the same or increased during this time. 2. The population size of cliff swallows living near roads has decreased over time. Group 1 Group 2 The total number of cliff swallow nests near roads increased during this time. 3. Scavenger population sizes have increased, and more road-killed swallows get eaten before they can be found. Group 1 Group 2 (additional data may be needed) 4. The number of cars driving on these roads has decreased over time. Group 1 Group 2 (probably not a factor)

Answer 1

Chapter 13 Post Lecture - Attempt 1 Scientific Thinking: What Clues About Biology Might Road Kill Provide? Hypothesis Data collected Hypothesis supported? b) 1. Traits that help individuals avoid being hit by cars have evolved through natural selection in the cliff swallow population. The wing shapes of swallows killed on roads differ from those of the general population. ves (additional data may be needed) 2. The population size of cliff swallows living near roads has decreased over time. The total number of cliff swallow nests near roads increased during this time. (probably not a factor) 3. Scavenger population sizes have increased, and more road-killed swallows get eaten before they can be found. Avian scavengers did not increase during this time, and terrestrial scavengers probably did not increase. (probably not a factor) 4. The number of cars driving on these roads has decreased over time. Car traffic stayed the same or increased during this time. (probably not a factor)