From 1930 to 1939 fire ants spread inland about 60 miles from their point of introduction in mobile

b. heterotroph

explanation:

because the light is a great source of energy for the plants to survive. (i hope this )

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.