An increasing salt content in the oceans of the world is a good example of 1) one-way change 2) reversible change 3) cyclical change 4) repetitive change

What is the difference between how ionic and covalent bonds form

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?

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 .