The length of the spinal cord in adults is inches from the base of the medulla oblongata to the junction between the first (l1) and second (l2) lumbar vertebrae.

Which of the following best describes homeostasis? a. keeping the internal environment in a stable state b. keeping the external environment in a stable state c. beneficial characteristics resulting from mutation d. reproduction that results in offspring identical to the parent.

Liquid water turns into water vapor at which step in the water cycle? a. precipitation o b. water run off c. evaporation d. condensation

How can an organ, such as the lungs, work for multiple body systems?