Menstruation begins in response to ____
a. rising levels of FSH and LH
b. rising levels of GnRH
c. rising levels of progesterone
d. falling levels of progesterone
e. rising levels of estrogen
ANSWER: d
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If pyruvate oxidation is blocked, what will happen to the levels of oxaloacetate and citric acid in the citric acid cycle shown in the accompanying figure?
A) There will be no change in the levels of oxaloacetate and citric acid. B) Oxaloacetate will decrease and citric acid will accumulate. C) Oxaloacetate will accumulate and citric acid will decrease. D) Both oxaloacetate and citric acid will decrease. E) Both oxaloacetate and citric acid will accumulate.
What is the correct order of gene expression in the early Drosophila embryo?
A. pair-rule genes, gap genes, segment polarity genes B. gap genes, pair-rule genes, segment polarity genes C. gap genes, segment polarity genes, pair-rule genes D. segment polarity genes, pair-rule genes, gap genes
Which is MOST likely a cancer treatment?
A. a drug that kills only very small cells B. a drug that kills only very large cells C. a drug that kills only slowly dividing cells D. a drug that kills only rapidly dividing cells
Which of these terms specifically means the intake and expulsion of air using the lungs?
a) inspiration b) aeration c) Ventilation d) Oxygenation