Truly modern molecular biology emerged with the uncovering of the structure of DNA in the 1960s and concurrent advances in biochemistry and genetics. Molecular biology is one of three primary molecular-scale biological sciences, the others being biochemistry and genetics.
1 Students should know the parts and functions of the circulatory and respiratory systems and how they work together for respiration. 2  Students should also understand what homeostasis is and that all living things must be able to maintain homeostasis.
The human body requires oxygen to function. It takes in oxygen and releases waste gas in the form of carbon dioxide. This two-part process is called respiration. There are two types of respiration: anaerobic and aerobic. Anaerobic respiration doesnât use oxygen and is mainly a function of simple, one-celled organisms.