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Which hormone controls the production of sperm

What are hormones? a. they are minerals needed for proper bone formation. b. they are the parts of the body targeted by endocrine glands. c. they are substances needed for muscle and nerve activity. d. they are substances released by endocrine glands.

The "credit hour" is: the exact hour your tuition is due the basis for which semester hours are awarded an iou the amount of time you spend in class