| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| did darwin propose natural selection | 0.81 | 0.5 | 9337 | 86 |
| when did darwin propose natural selection | 1.74 | 0.2 | 4125 | 95 |
| did darwin observe natural selection | 1.83 | 0.6 | 7974 | 53 |
| did darwin discover natural selection | 0.26 | 0.7 | 5886 | 14 |
| how did darwin explain natural selection | 0.66 | 0.5 | 8909 | 84 |
| what did darwin say about natural selection | 1.81 | 1 | 8110 | 83 |
| how did darwin describe natural selection | 1.36 | 0.3 | 5229 | 19 |
| darwin studied actual natural selection | 0.18 | 0.2 | 878 | 64 |
| what is natural selection by darwin | 1.06 | 1 | 8082 | 50 |
| darwin evolution and natural selection | 0.96 | 1 | 4829 | 89 |
| darwin s theory of natural selection | 1.38 | 0.2 | 2088 | 44 |
| darwin natural selection theory | 0.77 | 0.3 | 8279 | 28 |
| darwin's idea of natural selection | 1.62 | 1 | 4994 | 16 |
