Imagine that you have cells with three different shapes: a sphere, a cylinder, and a paralleliped. Each cell type has the same volume, 1 micrometer^3 and the radius of the sphere and the cylinder are equal to the width of the two sides of the rectangular cell. What are the volume/surface ratios for these shapes? Which shape is better? Why? Why might a given weight of small cells be more metabolically active than the same weight of