The diagram below represents the pathway of blood throughout the body. Which structures represent the pulmonary circuit? a) 8, 1, 3, 5
b) 3, 5, 2
c) 6, 8, 1
d) 7, 4, 6
e) 4, 6, 8

what's the question ?

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".

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