What order of events would show how natural selection occurred in a population of lice that could originally be controlled by the chemical permethrin?

A) A louse population evolves resistance to permethrin; permethrin is used to kill lice; lice become more common in schoolchildren.
B) Some lice are resistant to permethrin; permethrin is used to kill lice; lice resistant to permethrin become the most common type.
C) Permethrin resistance is common in lice; permethrin is used to kill lice; most lice become sensitive to permethrin.
D) Permethrin is used to kill lice; individual lice change in order to survive exposure to permethrin; most lice become resistant to permethrin.


B

Biology & Microbiology

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Fill in the blank(s) with the appropriate word(s).

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