Compare all the organisms. what trend do you see? the proportions of dna bases vary greatly among organisms. the proportions of dna bases are similar in closely related organisms, but different in organisms that are not closely related. the proportions of dna bases are similar among all organisms.

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.