Which population is most likely to be in hardy-weinberg equilibrium? (1) a large population of ocean fish that lives in an unpolluted ecosystem that has abundant food? (2) a large population of prairie grasses that lives in an ecosystem that is frequently burned by wild fires? (3) a medium-sized population of birds that lives on a chain of islands that have different food sources? (4) a medium-sized population of bacteria that lives on crop plants that are frequently sprayed with pesticides?