Menstruation begins in response to

a. rising levels of FSH and LH.
b. falling levels of estrogen.
c. falling levels of progesterone.
d. falling levels of estrogen and progesterone.
e. GnRH secretion.


Answer: d

Biology & Microbiology

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Suppose you explored a new planet and found a photosynthetic organism unlike any on Earth. You repeat

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What will be an ideal response?

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Which of the following is a salt? 

A. NaOH B. HOH C. H2SO4 D. MgCl2

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What sample statistic is not likely to be used to construct a confidence interval of a population mean?

A. Sample mean B. Sample standard deviation C. Sample range D. Number of observations

Biology & Microbiology