Why is bio stimulation less invasive for an ecosystem?

When analyzing tree rings, what do scientists assume a thin ring indicates?

Explain how scientists use geologic time to determine the age of landforms.

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 .