Which of the four fundamental forces X over very long distances what does not cause planets in the solar system to pull on each other? A. Gravitational
B. Weak nuclear
C. Strong nuclear
D. Electromagnetic

answer : D

3. in the fruit fly, recessive mutation brown, b, causes brown color of the eye and absence of red pigment. recessive mutation p of another independent gene causes purple color of the eye and absence of brown pigment. the cross of a brown-eyed female and purple-eyed male produced wild type eyes. what will be the colors and their ratio in f2?