6. In addition to being an airway, the is the location of the human vocal cords 7. Cilia in cells along the trachea and nasal passages secrete which traps dirt and particles from the air.
8. Air is only, approximately 21% oxygen. The majority of air is .
9. The medulla oblongata controls the contraction and relaxation of the , causing the lungs to inflate and deflate during breathing.
10. Explain the process of breathing. Begin with inhalation and describe the route that the air takes to the lungs, and what happens when the air reaches the lungs. Include in your description the terms: mouth, nose, pharynx, trachea, bronchi, lungs, alveoli, carbon dioxide, oxygen, and capillaries

Which of the following is an example of a non-falsifiable hypothesis? a. there is a teacup orbiting the milky way galaxy. b. there is no life on mars. c. the human species started in africa. d. humans cannot live without the amino acid methionine

Anybody who knows ap biology, can you friend or message me

Dr. kaylan is an ecologist who studies bird behavior. she sets up an experiment to test which type of food crows are most likely to eat when given a choice between walnuts, corn, and sunflower seeds. to perform her experiment, dr. kaylan places three food bins in an area frequented by cows. each bin contains one of the three food types. then, she measures how much of each food type is eaten every day for a month and summarizes the results of her experiment in the pie chart below. based on her results, dr. kaylan concludes that crows choose to eat corn more frequently than other food sources because it has a higher nutritional value. what is a reasonable alternate conclusion that can be drawn from dr. kaylan's data