Item CA011002: If the DNA of Species X and Species Y is more similar than the DNA of Species X and Species Z, then Species X and Species Y have a more recent common ancestor than Species X and Species Z.
If the DNA of Species X and Species Y is more similar than the DNA of Species X and Species Z, what is a reasonable conclusion about the common ancestors of these three groups?
- Species X and Species Y have a common ancestor, but Species X and Species Z do not.
- Species X and Species Z have a more recent common ancestor than Species X and Species Y.
- Species X and Species Y have a more recent common ancestor than Species X and Species Z.
- Similarities in DNA do not provide information about whether two groups share a common ancestor.
- Distribution of Responses
- Points Earned
| Group | Correct | Total | Percent |
|---|---|---|---|
| Overall | 354 | 559 | 63% |
| Grades | |||
| 6–8 | 15 | 23 | 65% |
| 9–12 | 310 | 499 | 62% |
| Gender | |||
| Male | 132 | 221 | 60% |
| Female | 196 | 300 | 65% |
| Primary Language | |||
| English | 320 | 516 | 62% |
| Other | 10 | 13 | 77% |
- Distribution of Responses
- Points Earned
| Group | Correct | Total | Percent |
|---|---|---|---|
| Overall | 201 | 281 | 72% |
| Grades | |||
| 6–8 | 12 | 18 | 67% |
| 9–12 | 169 | 229 | 74% |
| Gender | |||
| Male | 81 | 109 | 74% |
| Female | 98 | 135 | 73% |
| Primary Language | |||
| English | 178 | 243 | 73% |
| Other | 7 | 9 | 78% |
- Distribution of Responses
- Points Earned
| Group | Correct | Total | Percent |
|---|---|---|---|
| Overall | 247 | 305 | 81% |
| Grades | |||
| 6–8 | 3 | 3 | 100% |
| 9–12 | 222 | 280 | 79% |
| Gender | |||
| Male | 112 | 139 | 81% |
| Female | 120 | 150 | 80% |
| Primary Language | |||
| English | 222 | 276 | 80% |
| Other | 4 | 8 | 50% |