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 respiratory system in the frog and the human works to supply the blood with oxygen, which pumps all over the body for it to function. Similarities include: both have lungs which add fresh oxygen to your blood. Both have nostrils that take air in and a windpipe that carries oxygen to the lungs.