A peacock and a turkey mate, producing a viable but infertile turcock. This is an example of: A. gametic isolation

B. hybrid inviability

C. behavioral isolation

D. hybrid sterility

E. hybrid breakdown

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