The atomic mass of an element is a. twice the number of protons in one atom of the element. b. the sum of the protons and neutrons in one atom of the element. c. a weighted average of the masses of an element’s isotopes. d. a ratio based on the mass of a carbon-12 atom.

cell differentiation  is how generic embryonic  cells  become specialized  cells. this occurs  through a process called gene expression. gene expression is the specific combination of genes that are turned on or off (expressed or repressed), and this is what dictates how a  cell  functions.

explanation:

well, you would divide 135 by 33 to get your answer. then that is how many seconds it would take. boardman should fly about 132 m or 4.090909090909091 seconds.