Q: The nervous system is made up of these? Choices: - fibers - blood cells - muscles - neurons A:
neurons

Q: Terrestrial animals lose water by evaporation from their skin and which surfaces? Choices: - anaerobic - digestive - pulmonary - respiratory A:
respiratory

Q: What is the wavelength of light expressed in? Choices: - nanoseconds - millimeters - vatts - nanometers (nm) A:
nanometers (nm)

Q: An estimated 100 trillion of these live in the gut of an average person? Choices: - viruses - pathogens - algae - bacteria A:
bacteria