Evolution
Evolution and Natural Selection
New species can arise when barriers to reproduction within a population lead to two populations that over time e…
Item SP005003: For two populations of the same species to become two different species, the populations must be separated so that they cannot reproduce with each other, and they have to experience different environmental conditions.
What is required for two populations of the same species to become two different species through natural selection?
- The only thing required is that the two populations have to be separated so that they cannot reproduce with each other.
- The only thing required is that the two populations have to experience different environmental conditions.
- The populations must be separated so that they cannot reproduce with each other, and they have to experience different environmental conditions.
- Two populations of the same species cannot become two different species.
Pre-Test
Answer Choice |
Overall |
Grades |
Gender |
Primary Language |
||||
|---|---|---|---|---|---|---|---|---|
| n = 580 |
6–8 n = 25 |
9–12 n = 514 |
Male n = 254 |
Female n = 286 |
English n = 526 |
Other n = 13 |
||
| A. | The only thing required is that the two populations have to be separated so that they cannot reproduce with each other. | 10% | 8% | 10% | 11% | 8% | 10% | 8% |
| B. | The only thing required is that the two populations have to experience different environmental conditions. | 14% | 24% | 14% | 15% | 12% | 14% | 15% |
| C. | The populations must be separated so that they cannot reproduce with each other, and they have to experience different environmental conditions. | 59% | 48% | 59% | 57% | 62% | 59% | 69% |
| D. | Two populations of the same species cannot become two different species. | 17% | 20% | 17% | 17% | 18% | 17% | 8% |
Post-Test (Control)
Answer Choice |
Overall |
Grades |
Gender |
Primary Language |
||||
|---|---|---|---|---|---|---|---|---|
| n = 255 |
6–8 n = 15 |
9–12 n = 195 |
Male n = 97 |
Female n = 119 |
English n = 205 |
Other n = 6 |
||
| A. | The only thing required is that the two populations have to be separated so that they cannot reproduce with each other. | 18% | 13% | 17% | 23% | 13% | 16% | 50% |
| B. | The only thing required is that the two populations have to experience different environmental conditions. | 13% | 13% | 13% | 13% | 13% | 14% | 0% |
| C. | The populations must be separated so that they cannot reproduce with each other, and they have to experience different environmental conditions. | 64% | 67% | 65% | 59% | 71% | 66% | 33% |
| D. | Two populations of the same species cannot become two different species. | 4% | 7% | 5% | 5% | 3% | 4% | 17% |
Post-Test (Treatment)
Answer Choice |
Overall |
Grades |
Gender |
Primary Language |
||||
|---|---|---|---|---|---|---|---|---|
| n = 301 |
6–8 n = 8 |
9–12 n = 274 |
Male n = 134 |
Female n = 150 |
English n = 274 |
Other n = 9 |
||
| A. | The only thing required is that the two populations have to be separated so that they cannot reproduce with each other. | 19% | 13% | 19% | 13% | 24% | 19% | 22% |
| B. | The only thing required is that the two populations have to experience different environmental conditions. | 8% | 0% | 8% | 13% | 4% | 8% | 11% |
| C. | The populations must be separated so that they cannot reproduce with each other, and they have to experience different environmental conditions. | 69% | 88% | 69% | 71% | 68% | 70% | 67% |
| D. | Two populations of the same species cannot become two different species. | 4% | 0% | 3% | 3% | 4% | 3% | 0% |