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biology Practice tests Neco, Jamb, Wascce,SSce, Sat, Gre, Toefel, Gmat Online

Practice biology tests question Below by selecting the right option.


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In the root vascular system, the stele is directly surrounded by the




cortex
B


endodermis
C


parenchyma
D

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The only vein that carries pure oxygenated blood is the




pulmonary vein
B


hepatic vein
C


sciatic vein
D

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The function of the fluid-filled pericardium is to




supply the heart wit
B


prevent disease orga
C


reduce the intensity
D

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