Fill in the missing term The fill in is larger and more complex than the fill in cell. Eurkayotic cells contain a structure called the fill in which is a distinct central organelle that contains the cell's fill in material. fill in are specialized structures that carry out specific cell functions. The cell is surrounded by a thin structure call fill in which allows nutrients to pass in and out of the cell.​

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 .