A I believe should be correct
The basic building block of DNA and RNA are Nucleotides.
as insects became exposed to pyrethroids, toxicity of pyrethroids weakened over time. which means that Most insects had the allele for pyrethroid resistance, but it remained masked. The allele for said pyrethroid resistance, evidently increased throughout the population.
has this helped?
Rock, soil, water, & air on earth!
