Which of the following changes would lead to an increase in surface-area-to-volume ratios? Which of the following changes would lead to an increase in surface-area-to-volume ratios? increasing the number of layers in the chloroplasts of plants decreasing the projections of the choanocytes of sponges on the outer surface of the body thickening of the body of earthworms reducing the branching of the mesoderm tissues of sponges