In what direction is the net force and what is its value?
(hint: there are only 2 forces involved, think about the direction the
object is "pushed")
down, 75 newtons
right, 70 newtons
right, 100 newtons
left, 70 newtons

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.

the answer is c on e2020, bud.

cell division is not regulated in tumor cells.