Which of the following statements correctly describes a typical trend during the initial stages of succession in a terrestrial ecosystem?

48. Which of the following statements correctly describes a typical trend during the initial stages of succession in aterrestrial ecosystem?A.Food webs become less complex.B.Diversity of plant species increases.C.The amount of biomass and nonliving organic matter decreases.D.The litter layer becomes thinner because of increased assimilation of nutrients by shrubs and trees.E.The storage of inorganic nutrients within individual plants decreases.

Use the following information to answer questions 49-53In an investigation of interspecies competition, researchers grew the unicellular protozoanParamecium aureliain a 5mL culture andParamecium caudatumin a separate 5 mL culture.P. aurelia and P. caudatumwere grown together ina third 5 mL culture. Each day a small sample of each culture was removed so the total number of individuals could beestimated, and the remainder of the population was transferred to fresh growth medium. The experimental results arerepresented in the graphs below.49.Which of the following conclusions is best supported by the results of the experiment?

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