Which of the following statements is not correct concerning qualitative and quantitative research? a. research cannot use both qualitative and quantitative methods in a study. b. research can use both qualitative and quantitative data in a study. c. quantitative research uses numbers and measurements. d. qualitative research uses descriptions and observations.

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