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1. A man treated his home with a pesticide that kills roaches. The first application of the
pesticide killed 92% of the roaches. Two months later he applied the pesticide to his home again, but
the second application killed only 65% of the roaches. What would best explain the decrease in the
effectiveness of the pesticide?
F The pesticide is effective only against mature roaches.
G Once roaches learned how to fight the pesticide, they taught others.
H The surviving roaches were naturally resistant to the pesticide, and that resistance was
inherited by their offspring.
J The pesticide caused some of the roaches' digestive systems to mutate and metabolize
the pesticide


Sagot :

Answer:

The surviving roached were naturally resistant to the pesticide, and that resistance was inherited by their offspring.