Which of the following do scientists think might make up dark matter? Select the three correct answers. A. weakly interacting massive particles
B. black holes
C. gamma rays
D. massive compact halo objects
E. spiral galaxies
F. galaxy clusters

Which statement is the best summary of the model? a-a series of aerobic and anaerobic reactions take place in cells b- the sun's energy moves through trophic levels in a food chain c-light energy is converted into stored chemical energy plants.d- food molecules are broken down in the cells if living things.