Multiple Choice
Use the figure to answer the following 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) metabolism of the uterus
C) gestation period of rats
D) number of eggs fertilized
Correct Answer:

Verified
Correct Answer:
Verified
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