Answer the following question given this paragraph: The brain is the control center of the nervous system. It controls virtually all mental and physical processes. Q: What system is the brain the control center of? Choices: - adrenal - fibrous - circulatory - nervous A:
nervous

Answer the following question given this paragraph: Nobody really has such colorful eyes! The colors were added digitally after the photo was taken. They represent all the different colors of light. Light is a form of energy that travels in waves. Light of different colors has different wavelengths. Q: Different colors of light differ in terms of which important attribute? Choices: - lenses - prisms - frequencies - wavelengths A:
wavelengths

Answer the following question given this paragraph: Q: In response to changing environmental conditions, prokaryotic populations can undergo what process in short periods of time? Choices: - extinction - reproduction - fusion - evolution A:
evolution