Darren is a wildlife technician who is sampling specimens from a deer to determine reproductive cond

Darren is a wildlife technician who is sampling specimens from a deer to determine reproductive condition. Where in the deer would he reliably obtain samples of mature spermatozoa?

 

   A. Seminal vesicles.   
 

   B. Seminiferous tubules.   
 

   C. Bulbourethral glands.   
 

   D. Prostate gland.   
 

   E. Epididymis.   

Kaye is a dairy farmer who wishes to artificially inseminate a cow using bull semen. High quality semen would contain large numbers of what cell type?

 

   A. Spermatogonia.   
 

   B. Secondary spermatocytes.   
 

   C. Spermatids.   
 

   D. Spermatozoa.   
 

   E. Primary spermatocytes.   

Darren suffered from Eisenmenger's syndrome, in which blood from his pulmonary artery entered his aorta after birth. What is a possible cause?

 

   A. Failure of closure of the neural groove.   
 

   B. Failure of closure of the foramen ovale.   
 

   C. Failure of closure of the primitive streak.   
 

   D. Failure of somite development.   
 

   E. Failure of closure of the ductus arteriosus.