In the hematocrit and hemoglobin concentration experiment, altitude was the independent variable while gender and age were controlled variables, and Hct and Hb were dependent variables.
True
O False

Is made of materials that are poor conductors, such as glass, plastic, or rubber. they are used in an attempt to keep an electrical current within safe boundaries. for example, the plastic coating on an electrical wire is and is designed to keep the electricity in the wire