Up to ________ of urea is filtered and recycled.
A. 100%
B. 55%
C. 80%
D. 33%
Answer: C
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The major vessel delivering deoxygenated blood to the lungs is the ______.
A. pulmonary trunk B. pulmonary vein C. aorta D. superior vena cava
The congenital heart defect most often associated with Down syndrome is
A) ventricular septum defect. B) patent foramen ovale. C) tetralogy of Fallot. D) atrioventricular septal defect. E) transposition of the great vessels.
The gyrus that is located in the frontal lobe anterior to the central sulcus is the ________.
A. postcentral gyrus B. frontal gyrus C. precentral gyrus D. anterior gyrus
Platyhelminthes exhibit which of the following lifestyles?
A) Free-living B) Free-living and ectoparasitic C) Ectoparasitic and endoparasitic D) Free-living, ectoparasitic, and endoparasitic