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 nervous system and the endocrine system works together to coordinate the activity of different body parts. The nervous system is the first to react to internal and external stimuli, whereas the endocrine system kicks in later but its effects stay for long. Together, they help maintain homeostasis. 5. Respiratory System