What structure functions to prevent food from entering the trachea?

The instructions for making proteins come originally from

Which statement describes john tuzo wilson’s contribution to the theory of plate tectonics?

Prior to the mt. st. helens eruption on may 18, 1980, satellite and topographic views of the volcano were captured. based on the topographic map of mt. st. helens, what is the contour interval if the volcano height is 2,950 m? question 9 options: 600 m 400 m 750 m 500 m