Two tubes that connect to the trachea and to bronchioles are called

Which part of the cell is affected by the movement of molecules through diffusion, osmosis and active transport?

Amino acids contain the elements carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur. of the 20 amino acids found in humans, 11 are called "nonessential" because they can be manufactured by the body when needed. which elements in these 11 amino acids are commonly obtained from the metabolism of sugar molecules?

Which of the follow describes a disadvantage secondary sources have compared to primary sources?