Passage III
As a living cell's surface area-to-volume ratio (S/V) increases, so does the cell's ability to exchange substances with its environment.
To model this exchange process, different-sized cubes of gelatin were immersed in a dye for 1 minute. Table 1 lists the edge length, surface area, volume, S/V, and per-cent volume of gelatin that was dyed.
Figure 1 shows the S/V of certain rectangular solids and spheres.
Figure 2 shows the volume of certain rectangular solids and spheres as a function of surface area.
Table 2 lists the diameter and surface area of 5 types of spherical ova (egg cells).
17. Based on the information in Figure 1, a spherical cell with a diameter of 6 mm will have an S/V closest to which of the following values?
Your Answer is
Correct Answer is B
Explanation
Look at figure 1, when the abscissa is 6 mm (between 4 mm-8 mm), the ordinate corresponding to the sphere is about 0.7-1.4, so option B is 1 mm-1conform