The cells that secrete the acidic components of stomach juices _____
A) are the chief cells of the stomach
B) are the parietal cells of the stomach
C) are not needed for the transformation of pepsinogen to pepsin
D) are in the lumen of the stomach
E) add secretions along the esophagus
Answer: B
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The parents-to-be were shocked when an ultrasound scan done in the second trimester of the pregnancy showed a fetus with obviously broken leg bones and ribs. The doctor diagnosed osteogenesis imperfecta. This is caused by a mutation in a gene that encodes
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Social insect colonies are composed of highly specialized groups called what?
A. clines B. ecotypes C. castes D. species E. filial relatives
What do the letters inside the grid of a Punnett square represent?
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