The inability of a man to produce LH would result in
A. exaggerated secondary sex characteristics.
B. the inability of Leydig cells to produce testosterone.
C. the loss of positive feedback control on FSH release.
D. the inability of the anterior pituitary to produce FSH.
E. decreased GnRH production by the hypothalamus.
Answer: B
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According to Chargaff's rule, if the DNA of a species contains 20% adenine, what percent of guanine will it contain?
A. 20% B. 30% C. 50% D. 75%
The increase in the concentration of toxicants up the food chain is called:
a. bioaccumulation. b. biological magnification. c. detoxification. d. organic magnification. e. none of the above.
Crossing over occurs frequently during meiosis. Can crossing over occur during mitosis? Explain why mitotic crossing over may or may not be possible
What will be an ideal response?
Polyploid organisms ________
A) are transgenic B) are created from ES cells C) are knockout organisms D) have different numbers of each chromosome E) have extra complete sets of chromosomes