In 1980, Mount St. Helens erupted in Washington State. Hot air and debris destroyed the surrounding forest. Since then, scientists have been studying this area and are observing the ecological succession that is occurring.

Which graph shows what scientists have most likely observed about the species diversity in the area since 1980?
Species Diversity
Species Diversity
Time (years)
Time (years)
ecies Diversity
ecies Diversity

Ascientist is investigating the effects of salinity on fish development. he places fertilized fish eggs in an aquarium that contains low salinity and observes their development. what factor would improve experimental design the most? place the fish eggs in the open ocean because that is the natural habitat include another aquarium that has normal salinity to compare to the low salinity aquarium include an aquarium that replaces salt with sugar to confirm that the effects are specific to salt grow algae with the fish eggs in order to provide adequate nutrients to the developing embryos