Many mosquito populations today are resistant to pesticides that were historically effective. this pesticide resistance arose in these populations because:

Many insects are resistant to pesticides there are many factors that can lead to resistance in the organism.

In the population of mosquitoes some of them carry resistant gene that makes the organism survive even in the presence of pesticide.

This occurs because of mutation that is very rare when it comes to insects. This is the reason that after sometime the mosquito become resistant to pesticides. They are more likely to breed and survive.

mechanics (greek   is that area of science concerned with the behaviour of physical bodies when subjected to forces or displacements, and the subsequent effects of the bodies on their environment. the scientific discipline has its origins in ancient greece with the writings of aristotle and archimedes[1][2][3] (see history of classical mechanics and timeline of classical mechanics). during the early modern period, scientists such as galileo, kepler, and newton laid the foundation for what is now known as classical mechanics. it is a branch of classical physics that deals with particles that are either at rest or are moving with velocities significantly less than the speed of light. it can also be defined as a branch of science which deals with the motion of and forces on objects. the field is yet less widely understood in terms of quantum theory.

explanation: