John Tyler Bonner

RULE 1 Strength varies with size.

— John Tyler Bonner

RULE 2 Surfaces that permit diffusion of oxygen, of food, of heat in and out of the body, vary with size.

— John Tyler Bonner

RULE 3 The division of labor (complexity) varies with size.

— John Tyler Bonner

RULE 4 The rate of various living processes varies with size, such as metabolism, generation time, longevity, and the speed of locomotion.

— John Tyler Bonner

RULE 5 The abundance of organisms in nature varies with their size.

— John Tyler Bonner