The hormone released by the anterior pituitary that stimulates the development of the corpus luteum is
A. gonadotropin-releasing hormone (GnRH).
B. follicle-stimulating hormone (FSH).
C. luteinizing hormone (LH).
D. human chorionic gonadotropin (hCG).
E. progesterone.
C. luteinizing hormone (LH).
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Some bacteria can use sulfur instead of oxygen as a final electron acceptor. What would they produce during anaerobic respiration?
A. O2 B. S2 C. H2O D. H2S
Which solute must be administered in high amounts because of its very efficient secretion and removal by the kidney tubules?
A. glucose B. vitamin K C. amino acids D. HCO3- ions E. penicillin
Fossil evidence shows that giraffes living 1000 years ago had much shorter necks than the giraffes seen today. Which
statement best explains this observation? a. The two groups of giraffes are not related. b. The two groups of giraffes arose as a result of convergent evolution. c. The difference in neck length is evidence for homoplastic inheritance. d. The two groups of giraffes were located in different geographical locations. e. The giraffes acquired longer necks through the continuing process of natural selection.
Which of the following is most likely a regulatory molecule?
A. hair B. muscle protein C. steroid D. calcium