Question

question 15 1 pts what is the significance of the bloody uterine discharge exhibited by a breeding - age dog? indicates ovulation has past and breeding must wait until the next cycle indicates trauma due to copulation represents an aborted fetus indicates the beginning of a new reproductive cycle question 16 1 pts interstitial (also called __________) cells, located in the spaces between tubules within the testes, continually produce testosterone. sertoli cells interstitial cell masses leydig cells islets of langerhans

Explanation:

For Question 15, in breeding - age dogs, bloody uterine discharge typically indicates the start of a new reproductive cycle. It is not necessarily a sign of past ovulation, trauma from copulation, or an aborted fetus.
For Question 16, Leydig cells (also called interstitial cells) in the testes are responsible for continuously producing testosterone. Sertoli cells support sperm development, interstitial cell masses is not the correct term here, and Islets of Langerhans are in the pancreas.

Answer:

Question 15: Indicates the beginning of a new reproductive cycle
Question 16: Leydig cells