Suppose a new discovery in computer manufacturing has just m…

Suppose a new discovery in computer manufacturing has just made computer production cheaper.  Also, the popularity and usefulness of computers continues to grow.  Use Supply and Demand analysis to predict how these shocks will affect equilibrium price and quantity of computers.  Is there enough information to determine if market prices will rise or fall?  Why?    

Two agar plates, one containing the antibiotic streptomycin…

Two agar plates, one containing the antibiotic streptomycin and one without antibiotics, are inoculated with E. coli. After incubation, the streptomycin negative plate has many bacterial colonies, while the streptomycin positive plate has only a few colonies. Samples of the colonies from the positive plate are placed on another positive plate, and after incubation many colonies grow. In this experiment, what is the selective agent?