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Biology, 30.07.2019 05:00 Naysa150724

In the late 1940's, scientists released a group of chemicals, pyrethroids, to kill insects in auricular crops. by the year 2000, over 100 insect species were resistant to pyrethroids and scientists had to develop a new plan to kill them. explain what happened genetically in the insect population over time as the insects were exposed to pyrethroids. a) the toxicity of pyrethroids weakened over time. b) the allele for pyrethroid resistance increased throughout the population. eliminate c) pyrethroid resistance became the dominant allele in the insect populations. d) most insects had the allele for pyrethroid resistance, but it remained masked.

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