In order to study the effect of an antibiotic on bacterial growth you design an experiment in which you add varying concentrations of antibiotic to several groups of bacteria. You keep the exposure to light and the temperature constant among the various groups. What is an appropriate control?

Which part of the neuron below is indicated by the arrow, and what is its function? hormones send chemical signals throughout the body to regulate other body processes. hormones are chemical signals that are sent throughout the body to regulate other body processes. hormones send electrical signals throughout the body to regulate other body processes. hormones are electrical signals that are sent throughout the body to regulate other body processes.