Activation energy A. is the amount of energy required during activity such as flagellar motion B. requires the addition of nutrients in the presence of water C. is lowered by the action of organic catalysts D. results from the movement of molecules

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:

im guessing the west of station b

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2

answer: 31, 5556. 952 seconds