Fish Species Average # of Spots Original Species four to six
New Species 1 zero to two
New Species 2 eight to ten
Which of the following best describes why the two minnow populations evolved into separate species?
ОА. The same selective pressures were acting upon both populations, leading to a decrease in genetic variation and the
formation of two new species
ОВ. Natural selection acted upon the traits of the minnows in the second pond only, causing these fish to evolve into a new
species with new adaptations.
OC.
Natural selection acted upon the traits of the minnows in the first pond only, causing these fish to evolve into a new
species with new adaptations
OD
Different selective pressures were acting upon the two populations, leading to an increase in genetic variation and the
formation of two new species