SAT Subject Biology Practice Question 309: Answer and Explanation
The hormone labeled X in the diagram is often used in over-the-counter diagnostic tests to determine when ovulation has occurred. This hormone is
Correct Answer: D
D A surge in LH is what causes ovulation and is measured in the ovulation prediction kits. Estrogen and progesterone affect the uterus, not the ovary, and FSH causes development of a follicle (A, B, and C are wrong). Testosterone is a male hormone (E is wrong).