Which condition is a cause of impotency in men? undescended testicles that persist beyond puberty the inability of the penis to become erect a vasectomy, which is a surgical procedure to cut the vas deferens a low production of sperm in the testes the absence of the vas deferens in a male from birth

Prior to the development of dna fingerprinting, blood type could be used to determine possible parentage. although it might prove someone was not a parent, it could not show if someone was positively the parent, only that he or she might be a parent. which of the following is a true statement that can be made about parentage based on blood typing?

Which of the following statements are true chromosomes make up genes

Which sentence is an example of a strong conclusion to an autobiography? a. i stayed after school three days in a row to practice onstage in the auditorium. b. i knew i would have to practice all week to memorize my dance for the recital. c. after the recital was over, i knew practicing was worth it, and i was looking forward to my next big challenge. d. on opening night, i danced in front of a packed auditorium.