Base your answers to question 4 and 5 on the information below and on your knowledge of biology.
A biology class performed an investigation to determine the influence of exercise on pulse rate. During the investigation, one group of twelve students, Group A, counted how many times they could squeeze a clothespin in a 1-minute period, then exercised for 4 minutes, and repeated the clothespin squeeze for an additional 1 minute. Another group of twelve students, Group B, also counted how many times they could squeeze a clothespin in a 1-minute period, but then they rested for 4 minutes, and repeated the clothespin squeeze for an additional 1 minute. The data table below shows the average results obtained by the students.
Effect of Exercise on Number of Clothespin Squeezes
Groups of Student
Group A (exercise)
Group B (rest)
Average Number of Clothespin Squeezes During First Minute
75
74
Average Number of Clothespin Squeezes During Second Minute
79
68
4 State two specific examples from the description of the investigation and the data table that support this investigation being a well-designed experiment.
5 The chart below shows relative blood flow through various organs during exercise and at rest
A biology class performed an investigation to determine the influence of exercise on pulse rate. During the investigation, one group of twelve students, Group A, counted how many times they could squeeze a clothespin in a 1-minute period, then exercised for 4 minutes, and repeated the clothespin squeeze for an additional 1 minute. Another group of twelve students, Group B, also counted how many times they could squeeze a clothespin in a 1-minute period, but then they rested for 4 minutes, and repeated the clothespin squeeze for an additional 1 minute. The data table below shows the average results obtained by the students.
Effect of Exercise on Number of Clothespin Squeezes
Groups of Student
Group A (exercise)
Group B (rest)
Average Number of Clothespin Squeezes During First Minute
75
74
Average Number of Clothespin Squeezes During Second Minute
79
68
4 State two specific examples from the description of the investigation and the data table that support this investigation being a well-designed experiment.
5 The chart below shows relative blood flow through various organs during exercise and at rest