In metaphase I of meiosis
A) chromosomes condenses
B) chromosomes are arranged at the equator
C) chromosomes move towards opposite poles
D) chromosomes undergo cytokinesis
Ans: B) chromosomes are arranged at the equator
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While shopping at your local drugstore, you stop at the blood pressure machine. It measures your blood pressure as 115/75 (good—that's healthy!). This number means that
A. arterial pressure is 115 mm Hg when the ventricles contract and 75 mm Hg in between ventricular contractions. B. arterial pressure is 75 mm Hg when the ventricles contract and 115 mm Hg in between ventricular contractions. C. arterial pressure is 115 mm Hg when the atria contract and 75 mm Hg in between atrial contractions. D. your sinoatrial node generates a 115 mV signal and your atrioventricular node generates a 75 mV signal. E. your sinoatrial node generates a 75 mV signal and your atrioventricular node amplifies this to a 75 mV signal.
What endogenous process helps plants to keep their movements and other responses synchronized with the environment?
A. purine monitoring B. solar tracking C. a circadian clock D. auxin cycling E. gravitropism
A patient that experiences a tuberculin skin test reaction is experiencing which class of hypersensitivity reactions?
A) type I B) type II C) type III D) type IV E) type V
Evolutionarily, the jaws of vertebrates developed from
A. the operculum. B. the last pharyngeal arch of jawless fishes. C. the circular mouth of lampreys. D. the third pharyngeal arch of jawless fishes. E. the claspers.