2. Bacteria can kill organisms in eutrophic lakes by Blocking out sunlight, halting the photosynthetic process in underwater plants

Reducing oxygen dissolved in the water when feeding on decaying plants and animals

Growing out of control and breathing all of the oxygen in

the lake
Initially adding excess nutrients to the lake

The image shows the evolution of a species of fish. a few fish from a population developed different social behaviors and evolved into different species. two fish according to the image, the fish underwent . the new species of fish had mating seasons that were different from that of the original fish. because of the differences in mating seasons, the fish underwent reproductive isolation. this mode of isolation would be .