Evolution
Evolution and Natural Selection
Item EN049005: All dogs and cats share a common ancestor.
What do scientists find out when they trace the ancestors of dogs and cats?
- All dogs and cats living today share a common ancestor with each other that lived a very long time ago.
- All dogs share a common ancestor with each other, and all cats share a common ancestor with each other, but cats and dogs do not share a common ancestor with each other.
- Some, but not all, dogs share a common ancestor with cats. Some, but not all, cats share a common ancestor with dogs.
- Scientists cannot trace the ancestors of any two species back far enough to find out whether they had a common ancestor.
- Distribution of Responses
- Points Earned
| Group | Correct | Total | Percent |
|---|---|---|---|
| Overall | 251 | 580 | 43% |
| Grades | |||
| 6–8 | 11 | 25 | 44% |
| 9–12 | 216 | 514 | 42% |
| Gender | |||
| Male | 118 | 254 | 46% |
| Female | 114 | 286 | 40% |
| Primary Language | |||
| English | 223 | 526 | 42% |
| Other | 5 | 13 | 38% |
- Distribution of Responses
- Points Earned
| Group | Correct | Total | Percent |
|---|---|---|---|
| Overall | 120 | 255 | 47% |
| Grades | |||
| 6–8 | 5 | 15 | 33% |
| 9–12 | 90 | 195 | 46% |
| Gender | |||
| Male | 47 | 97 | 48% |
| Female | 54 | 119 | 45% |
| Primary Language | |||
| English | 93 | 205 | 45% |
| Other | 3 | 6 | 50% |
- Distribution of Responses
- Points Earned
| Group | Correct | Total | Percent |
|---|---|---|---|
| Overall | 172 | 301 | 57% |
| Grades | |||
| 6–8 | 4 | 8 | 50% |
| 9–12 | 155 | 274 | 57% |
| Gender | |||
| Male | 77 | 134 | 57% |
| Female | 84 | 150 | 56% |
| Primary Language | |||
| English | 154 | 274 | 56% |
| Other | 5 | 9 | 56% |