Second Law of Thermodynamics vs. Evolution According to the second law of thermodynamics, when energy is converted from one form to another, the amount of useful energy decreases. In relation to the theory of evolution, this law is not contradictory. The second law of thermodynamics is not relating to energy within living things because living things retain energy from the sun. The sun produces concentrated energy, which increases entropy. To maintain orderly structures, living things use this energy to synthesize complex molecules.
A specific point to prove the theory of evolution is cohesion of water and molecules. Water molecules have high cohesion that produces surface tension. This enables plants to retain water molecules that are chained. Without cohesion, plants would not have been able to survive. Water molecules including other molecules contain chemical bonds. All chemical bonds have energy that cannot be broken down.
They can break but the energy (protons, electrons) goes elsewhere to another molecule and bond. Bodies of all organisms use the same basic types of molecules; therefore can evolve without loss of energy. The amount of useful energy does not decrease among living things but is recycled. The second law of thermodynamics can portray a contradictory perspective of evolution but the source of energy must be considered. Energy is everywhere and in everything.
Living things have mandatory needs in order to live including energy. If the second law of thermodynamics contributed to evolution, life in general could not exist over this amount of time because the energy would decrease constantly until none was left.