Which sentence would the author disagree with? Bones adapt to the functions they perform.
Flexible skeletal system provides mobility and purpose for our body.
Bone
shapes are genetically controlled and routinely modified depending upon the work
performed by the muscle.
Each bone is a non-living organ comprised of several different tissues.

o conteúdo de calor de um sistema é igual à entalpia apenas para um sistema que é constante

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.