-In an experiment, rats' ovaries were removed immediately after impregnation and then the rats were divided into two groups. Treatments and results are summarized in the table. The results most likely occurred because progesterone exerts an effect on the
A) general health of the rat.
B) size of the fetus.
C) metabolism of the uterus.
D) gestation period of rats.
E) number of eggs fertilized.

Question

-In an experiment, rats' ovaries were removed immediately after impregnation and then the rats were divided into two groups. Treatments and results are summarized in the table. The results most likely occurred because progesterone exerts an effect on the
A) general health of the rat. 
B) size of the fetus. 
C) metabolism of the uterus. 
D) gestation period of rats. 
E) number of eggs fertilized.

Quizplus · Accepted Answer

Progesterone is crucial for maintaining the uterine lining and supporting pregnancy, so its effect on the metabolism of the uterus is likely responsible for the observed results.

-In an Experiment, Rats' Ovaries Were Removed Immediately After Impregnation