What happens in the alimentary canal?
O A. Amylases are broken down into proteins.
O B. Water is removed from the blood.
O C. The renal artery moves blood into the kidney.
O D. Macromolecules are broken down.

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