Some plasmids contain more than one gene. If a plasmid that carried a gene for resistance to heavy shiny mucous capsule will cause the bacterial colonies to appear more shiny than the dull wild
could isolate the bacteria that were transformed from the bacteria that did not transform. (FYI - the
tetracycline also carried the gene producing a heavy shiny mucoid capsule, explain how a scientist
type bacterial colonies.)

Which statements best describe the differences or similarities between a comparative investigation and an experimental investigation? check all that apply. experimental investigations are best for showing cause-and-effect relationships, while comparative investigations do not necessarily show this type of relationship. comparative investigations are often impractical and unrealistic, while experimental investigations are the most practical and realistic kinds of investigations. comparative investigations allow for the use of a wide range of variables but do not have a control group, while experimental investigations involve variables that can be controlled. both experimental investigations and comparative investigations are designed to answer scientific questions. both experimental investigations and comparative investigations focus on making observations rather than collecting new data.