In which of the following would it be possible to find the most dilute urine?
1.proximal tubule
2.loop of Henle
3.distal tubule
4.collecting duct
4
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Mixed venous blood samples can be taken from which of the following blood vessels?
A) pulmonary vein B) inferior vena cava C) pulmonary artery D) aorta E) superior vena cava
Which of the following are found in roots?
A. vascular tissue only B. ground tissue only C. dermal and vascular tissue only D. dermal, vascular, and ground tissue
The genome of which of the following types of animal virus can act directly as mRNA?
A) retroviruses B) +ssRNA viruses C) -ssRNA viruses D) ssDNA viruses E) dsRNA viruses
Transgenic plants have been modified for all of the following characteristics except:
A) nitrogen fixation. B) herbicide resistance. C) insect resistance. D) improved nutritional quality. E) reduced cost of production.