hello people, please help me, with the aid if a diagram describe the process of obtaining different products using fractional distillation

layer a is the exosphere and layer b is the thermosphere.   is the answer i think but i hope this .

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:

answer is slate

hope this

answer a fan shaped mass of sediment deposited at the base of a mountain front do to an abrupt change in stream gradient;