Question

What phrase best summarizes the theory of evolution by natural selection? A. Life evolves from other life. B. Only the strongest individuals survive. C. Over time, species evolve by adapting to their environment. D. Traits acquired over a lifetime are passed onto offspring. Over time insects have become resistant to insecticides. Which process explains how insecticide resistance developed? A. extinction B. speciation C. biological inheritance D. natural selection

Answer 1

Natural selection is a gradual process where biological traits become more or less common in a population depending on the usefulness of the trait. 
C. Over time, species evolve by adapting to their environment. 

Insecticide resistance developed through d. natural selection.