Astudent sets up an experiment with two groups of bacteria. one group is exposed to the normal amount of mercury found in the environment. the other group gets a larger dose which term describes a normal he treated group?

variable group
independent group
control group
experimental group

Need an answer asap 45 points and brainlest to the first person to answer why do scientific theories, such as biological and chemical evolution, represent the strongest explanation of the changes observed in the fossil record. must be in sentence form how can scientific theories on evolution and the fossil record change over time? must be in sentence form

Which of the following statements is true of cells

What do you think scientists face when classifying new organisms?