C
Cindie R
Guest
Draw to scale the outline of two spherical cells, one a bacterium with a diameter of 1 micrometer, the other an animal cell with a diameter of 15 micrometers. Calculate the volume, surface area, and surface to volume ratio for each cell. How would this latter value change if you included the internal membranes of the cell in the calculation of the surface area (assume internal membranes have 15 times the area of the plasma membrane)? (The volume of a sphere is given by 4piR^3/3 and its surface by 4piR^2, where R is its radius.) Discuss the following hypothesis: "Internal membranes allowed bigger cells to evolve."