The nucleolus disappears. Centrioles begin moving to opposite ends of the cell and fibers extend from the centromeres. Some fibers cross the cell to form the mitotic spindle. The nuclear membrane dissolves, marking the beginning of prometaphase.
That all the continents fit together and that animals were found in areas they could not survive.
Answer:
It is a visual explanation of the symbols used on the map. I hope this helps
Picture below
