Which of the following structures is not found in the respiratory system?
a. bronchi c. esophagus b. pharynx d. alveoli

What is the mass of each element in a 324.8 sample of co2

Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains

Which type of precipitation would most likely form when the surface air temperature is slightly below freezing and the air temperature increases as you move upward away from the ground?