The genus Dahlia is situated in the Asteroideae subfamily of the Asteraceae, in the Coreopsideae tribe. Within that tribe it is the second largest genus, after Coreopsis, and appears as a well defined clade within the Coreopsideae.
Aerobic respiration. Definition. noun. (1) A form of cellular respiration that requires oxygen in order to generate energy. (2) The process of generating energy by the full oxidation of nutrients through Krebs cycle where oxygen is the final electron acceptor.
Aerobic exercise improves the volume of oxygen your body can take in and use to fuel aerobic functions of your body. Activities include aerobic metabolism and cardiovascular exercise. Aerobic literally means with air, and the most biologically important to survive is oxygen. Therefore aerobic means with oxygen.