Trypsin activity 100
80
Relative reactivity
60
40
20
0
2.0
4.0
6.0
8.0
10.0
12.0
0.0
pH

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.

When a population split into two subgroups what is most likely to cause the subgroups to develop different traits?

24. how are vaccines used to keep people healthy?