Keyword Analysis & Research: what is the primary function of rod cells

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
what is the primary function of rod cells	0.68	0.4	4244	21	41
what	0.41	0.9	4092	18	4
is	0.71	0.2	5126	55	2
the	1.25	0.8	9781	92	3
primary	0.04	1	8655	54	7
function	1.44	0.8	988	84	8
of	0.49	0.3	9010	42	2
rod	1.35	0.3	5871	6	3
cells	1.26	0.6	4469	39	5

Keyword	CPC	PCC	Volume	Score
what is the primary function of rod cells	1.79	0.1	2354	79