Some male guppies show variation in their scale pattern. Male guppies can have a dull color that blends with the sand on streambeds, or they can have large spots that are highly visible.
A researcher is studying a sandy portion of a particular stream where most of the
male guppies have large spots. A predatory fish species invades the area. The predatory fish find the guppies primarily by sight.
Over time, which of the following is the most likely effect of the predators on the male guppies' scale pattern?
a) Most of the males will have large spots.
b) Most of the males will have a dull color.
c) Half of the males will have large spots and half of the males will have a dull
color.
d) Half of the males will have even larger spots and half of the males will have
smaller spots