DDT is an insecticide that was used extensively in the mid-1900s to kill mosquitos. it was very effective at first, but after a few decades DDT became less effective at killing mosquitos because many populations had evolved resistance to DDT. which of the following conditions would biologists say was required for the evolution of DDT resistance in a population

Ithink its because more have died recently than in the past.

Mars and earth have quite a few things in common. both are  terrestrial planets, both are located within the sun’s  habitable zone, both have  polar ice caps, similarly  tilted axes, and similar  variations in temperature. and according to some of the latest scientific data obtained by rovers and atmospheric probes, it is now known that mars once had a  dense atmosphere  and was covered with  warm, flowing water.