What is the advantage of using a lever in lifting heavy objects over lifting them directly?
a. reduces the weight of the object
b. reduces the input force as well as alters the force in conveinent direction
c. alters the input force in a convenient direction
d. reduces the input force

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:

okay i have so many questions. but the big one here is: um wt..f is this mess? ?

this is poiselle's equation from fluid mechanic in physics. mech eng