1. Things that have all the characteristics of life are . A) Cells
B) Organisms

2. Living things that are made of only one cell.
A) Unicellular
B) Single-celled
C) All of the above
D) None of the above

3. Unicellular and multicellular organisms are not organized.
A) True
B) False

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 .