Complex sentence: The metabolic theory of ecology is a theory that claims to explain the relationships between body mass and metabolic rate in organisms from unicellular microbes to plants and animals over 27 orders of magnitude, based on the physics and geometry of supply networks.
Split into simpler sentences: The metabolic theory of ecology is a theory that claims to explain the relationships between body mass and metabolic rate in organisms from unicellular microbes to plants and animals over 27 orders of magnitude. The theory is based on the physics and geometry of supply networks.