Widespread use of pesticide has lead to the development of:
More pesticide-resistant insects.
Answer: C
Explanation: The two chromatids of a duplicated chromosome are held together at a region of DNA called the centromere. Centromeres are the attachment points for microtubules, which are responsible for the guiding the movement of chromosomes during mitosis and meiosis.
Sister chromatids separate during anaphase
The southern portion of the region has the highest rates of HIV/Aids.
I hope this helps.