paramecium contractile vacuole contractions\nsalt concentration outside paramecium contractions per…
paramecium contractile vacuole contractions\nsalt concentration outside paramecium contractions per minute\nvery high 2\nhigh 8\nmedium 15\nlow 22\nvery low 30\nif this data is shown in a bar graph, which description accurately represents the bars?\nthe graph has five bars of equal height.\nthe bars range from tallest for very high concentration to shortest for very low concentration.\nthe bar for very low concentration is twice the height of the bar for medium concentration.\nthe bar for very high concentration is five times the height of the bar for very low concentration.
Answer
Explanation:
Step1: Analyze bar - height relationship
The number of contractions per minute represents the height of the bars in the bar - graph. The values for very high, high, medium, low, and very low salt concentrations outside paramecium are 2, 8, 15, 22, and 30 respectively.
Step2: Check each option
- Option 1: The values are 2, 8, 15, 22, 30, so the bars are not of equal height.
- Option 2: The bar for very high concentration (2) is the shortest and the bar for very low concentration (30) is the tallest, so this option is wrong.
- Option 3: The height of the bar for very low concentration is 30 and for medium concentration is 15. Since $30 = 2\times15$, the bar for very low concentration is twice the height of the bar for medium concentration.
- Option 4: The height of the bar for very high concentration is 2 and for very low concentration is 30. Since $30\neq5\times2$, this option is wrong.