Each of the following statements accurately describes a feature of arteries EXCEPT which one?
A) Arteries have an endothelial lining that reduces friction and promotes smooth blood flow.
B) Arteries have a smooth muscle layer on the outside, which provides some stiffness.
C) Elastin fibers in arterial walls allow stretching of the arteries.
D) Valves along major arteries maintain directed blood flow.
E) A tough supportive layer of connective tissue containing collagen is found on the outer surface of arteries.
D
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Light reactions occur in the ________, and the Calvin cycle occurs in the ________ of the chloroplast of a typical mesophyll leaf cell
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During meiosis, a hexaploid hybrid spontaneously eliminates one set of chromosomes (eliminates 1n). What is the most likely result of this deletion?
A. The hybrid will be able to reproduce with one of the parental species. B. The hybrid will be able to reproduce only by self-fertilization. C. The hybrid will no longer be polyploid. D. The hybrid will no longer be able to reproduce.