Population density is calculated by a dividing the number of organisms in a region by the land area b multiplying the number of organisms in a region by the land area dividing the land area by the number of organisms in the region d. by subtracting the land area from the number of organisms in a region

If we compare and contrast electromagnetic waves with sound waves, all but one statement is true. that is a) sound waves require a medium to travel while electromagnetic waves do not. b) electromagnetic waves can travel through the vacuum of space while sound waves cannot. c) electromagnetic waves must have a medium in which to travel, but sound waves can travel anywhere. eliminate d) sound waves must bounce off of matter in order to travel while electromagnetic waves do not require matter to be present.