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What portion of the brain controls respiration?

Which one of the following is a strong, narrow cord of fibrous tissue that attaches muscle to bone? Tendon Ligament Phalanx Fascia The _______ is responsible for closing the airway to the lungs when one swallows. pharynx epiglottis larynx glottis Which one of the following statements about colds is false? Colds result from contact with […]

What is a hypothesis?

Why is the sky blue? Why do bees sting? Why is the ocean salty? These are questions a young child may ask about the world based on his or her observations and experiences. As children grow older, their inquisitive nature may begin to fade. Anyone involved in the scientific process, however, must continually make observations […]