Muscular contractions control the position of the scrotum, which allows the penis to become erect
helps regulate the temperature of the testicles
causes semen to be ejaculated during intercourse
causes peristaltic action to move semen through the vas
deferens

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