During reconstruction in the south, poll taxes were used to
strengthen african american representation in government.
ensure that voters were qualified to participate in elections.
deny african american citizens participation in government.
prevent former confederate officers from voting in elections.

Ais a group of individuals of the same that exist together in the same place at the same time

Aflame cell is at the end of each tubule of the nephridium malpighian tubules kidneys none of the above

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.