The hormone ____________________ (estrogen/testosterone) controls the development of male characteristics.
Identify the structure in the diagram above where fertilization usually takes place.
When does the male reproductive system start producing sperms?
What structure is formed when fertilization occurs?
What is sexual reproduction?
When a human egg is not fertilized, extra blood and tissue from the uterus are released through the vagina in a process called _______________ (ovulation/menstruation).
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