A physician finds that a nine-year-old male patient is entering puberty much earlier than is usual. Such a condition is most likely the result of a tumor in the _____
A) hypothalamus, producing elevated levels of testosterone
B) anterior pituitary, producing elevated levels of testosterone
C) testes, producing elevated levels of estrogen
D) anterior pituitary, producing elevated levels of gonadotropin-stimulating hormone
Answer: D
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How many times must the centrosomes replicate in order for meiosis to occur?
A. once B. twice C. four times D. Centrosomes do not replicate.
The chemistry of life on Earth takes place in _____________
a. carbon b. water c. silicon d. methyl alcohol
When you chose your physician, it is important that ________
A) you feel comfortable with his or her style B) he or she be both an MD and a DO C) he or she work in a big hospital and not in private care D) he or she have e-mail and phone access 24/7
Friedrich Wöhler refuted the scientific concept of vitalism during the early 1800s by proving that organic molecules could be synthesized outside a living organism.
Answer the following statement true (T) or false (F)