Answer:
because it needs its plasma membrane to live and if it freezes then it dies
Answer:
Systemic gas exchange is the unloading of oxygen and loading of carbon dioxide
When an enzyme binds its substrate, it forms an enzyme-substrate complex. This complex lowers the activation energy of the reaction and promotes its rapid progression by providing certain ions or chemical groups that actually form covalent bonds with molecules as a necessary step of the reaction process.
Some diseases are caused by mutations that are inherited from the parents and are present in an individual at birth, like sickle cell disease.
A and C are balanced while B is unbalanced.