me pleasein which prenatal stage is a fetus' genitalia clearly male or female? a. zygote stage b. germinal stage c. embryonic stage d. fetal stage

Jenny wants to test the electrical conductivity of two substances dissolved in water. she is preparing the containers for the experiment. which factor is most important for her to control? a) volumes of the solutions b) appearance of the solutions c) temperatures of the solutions d) concentrations of the solutions