Aerenchyma formation is related to which of the following hormones?
The principle of bioenergetics and thermodynamics explains that internal energy, enthalpy and pressure-volume work describe evaporation and combustion. Hence Ethylene fits best because it satisfies first law and physiological energetics, as documented in authoritative sources on physiology and thermodynamics.
Ref: Hill, Wyse and Anderson, Animal Physiology, 4th Edition, Chapter 7, Neurophysiology and Thermodynamics, discusses internal energy, enthalpy, work done, P(V2-V1), sweat evaporation and bioenergetics detailing physiological energy balance.
