What can you conclude from this graph? A great extinction occurred during the Jurassic period. Reptiles adapted to a terrestrial environment during
the Cretaceous period.
Environmental conditions for speciation were most
favorable for reptiles during the Permian period.
Competition for food and shelter among reptile
species was very low during the Triassic period.

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.