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, adj. Aerobe An organism that must (obligate aerobe) or is able to (facultative aerobe) live in an O2-containing environment, and which may use O2 as the terminal electron acceptor in respiration. aerÂ·obe (Är'Åb)