When does the Mitosis-promoting factor (MPF) Cyclin concentration decline during a typical cell cycle in clam eggs? A. when the cells grow larger
O
B. when DNA is synthesized
O
C. when haploid gametes are produced
O
D. when the cell nucleus divides

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