13. on a topographic map, the elevation of an area with contour lines that are very far apart is

a) nearly flat

b) very steep

c) mountainous

d) constantly changing

A topographic map shows both the man-made and natural features present on the surface of the Earth in two-dimension using the contour lines. The elevations on this map is shown with the help of these contour lines. A topographic map shows the different geological features of the Earth's surface.

In this map, if the contour lines are far apart, then, it means that the area between those contour lines is almost nearly flat.

Hence, the answer is 'nearly flat'.

prophase: we can observe the chromosomes to coil up and condense. they become visible. nuclear membrane and envelope disintigrate.s

metaphase: chromosomes align at the center, the metaphase plate. spindle fibers attach to centromeres of the sister chromatids. they meet at kinetochores.

anaphase: sister chromatids are pulled towards each opposing centromere, set on different poles.

telophase: chromosomes are now clustered up only on either sides of the cell. nuclear membranes reform, and a new cell wall forms along the cell plate. this will lead to cytokinesis, the process that divides the cell membrane and forms the cell wall.