I NEED help with this biology question

Why is it important that fibrin is insoluble in water?

Which equation is used to calculate the magnetic force on a charge moving in a magnetic field

Can bacteria reproduce in a way such that when you start out with two bacteria, you get five bacteria? why or why not? * a. yes, because bacteria reproduce sexually, and can produce any number of offspring, just as humans do. b. no, because bacteria grow at an exponential rate. c. no, because when bacteria reproduce, they split into two parts, and two bacteria splitting would result in four bacteria.