Cells -> Tissues -> Organs -> Organs systems -> Organisms
Proteins are made of hundreds and thousands of polymers called Amino Acid which are attached with each other in long chains. There are 20 different types of amino acids that make up a protein
your answer is the third one.
Usually representing a solid you used a 3d model.
And there are balls in them representing atoms and in a video it shakes or vibrates to represent the motions of a solid.
C. The Bering Land Bridge once connected what would be Russia and North America but the the movement of these continents separated the land bridge
