meiosis migration immune responses gene mutations
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: When the pesticide DDT was first used, it killed nearly every mosquito it touched. Within a few years, however, many mosquitoes became resistant to DDT and survived. What enabled this to happen?
Possibilities:
- meiosis
- migration
- immune responses
- gene mutations

gene mutations