Keyword Analysis & Research: natural selection theory was proposed by

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
natural selection theory was proposed by	0.14	0.3	7932	80	40
natural	1.02	0.1	8368	29	7
selection	0.2	0.7	6891	56	9
theory	1.2	0.6	6310	61	6
was	0.5	0.3	7288	37	3
proposed	0.56	0.4	4799	33	8
by	0.99	0.4	8802	18	2

Keyword	CPC	PCC	Volume	Score
natural selection theory was proposed by	1.89	0.7	8398	58