| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| the retina has two types of photoreceptors | 0.24 | 0.9 | 2062 | 50 | 42 |
| the | 0.7 | 0.4 | 5046 | 78 | 3 |
| retina | 1.46 | 0.2 | 2931 | 74 | 6 |
| has | 1.07 | 0.1 | 4943 | 49 | 3 |
| two | 1.17 | 1 | 1486 | 51 | 3 |
| types | 1.62 | 0.3 | 8803 | 69 | 5 |
| of | 1.45 | 0.8 | 3865 | 52 | 2 |
| photoreceptors | 1.94 | 0.7 | 1970 | 81 | 14 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| the retina has two types of photoreceptors | 0.39 | 0.3 | 6225 | 46 |
| two types of photoreceptors in the eye | 1.69 | 1 | 6195 | 45 |
| the photoreceptors of the retina are called | 0.5 | 0.4 | 1913 | 50 |
| the retina has photoreceptors known as | 1.73 | 0.1 | 8874 | 92 |
| what are the two types of photoreceptors | 1.77 | 0.5 | 3838 | 55 |
| photoreceptors of the retina | 0.52 | 0.3 | 35 | 92 |
| the retina contains photoreceptors called | 1.67 | 0.1 | 6160 | 57 |
| what are the 2 types of photoreceptors | 1.05 | 0.5 | 6184 | 86 |
| the photoreceptor cells in the retina are | 1.95 | 0.7 | 3179 | 33 |
| two kinds of photoreceptors | 0.86 | 0.3 | 98 | 45 |
| what are the two groups of photoreceptors | 0.03 | 0.8 | 2035 | 97 |
| what are the photoreceptors of the eye | 0.21 | 0.7 | 1424 | 56 |
| retina function and photoreceptors | 1.16 | 1 | 6734 | 88 |
| how many photoreceptor types in human eye | 0.88 | 0.7 | 6130 | 93 |
