What happens first during cellular respiration?

A. The movement of small organic molecules into a mitochondrial

B. The breakdown of food molecules into smaller organic molecules

C. The formation of many molecules of ATP

D. The breakdown and small organic molecules into carbon dioxide

Which of the following is the best definition of a eukaryota? a. a one-celled organism that does not have a membrane-bound nucleus b. a one-celled organism that does not have a cell wall c. an organism whose cells each contain a membrane-bound nucleus d. an organism whose cells each have a cell wall