What happens to the speed of light as it exits the air and enters a glass of water? А
It slows down
B
It speeds up
С
It remains constant
D
It first slows down and then speeds up.

Which of the following is likely not involved in this example of ecological succession? a) the rotting remains of plants add to the fertility of the soil. b)the soil becomes so fertile that eel grass is replaced by other plant species. c) the roots from plants stabilize the sediment, keeping it in place. d) the concentration of salt becomes so high that all plant life is destroyed.