It is thought that President Abraham Lincoln suffered from a genetic disorder known as Marfan syndrome. Which types of fibers are affected in this disorder?

A. collagen fibers
B. hyaline fibers
C. elastic fibers
D. reticular fibers
E. ground fibers


Answer: C

Biology & Microbiology

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Among invertebrates, increased speed along the axon is brought about by increasing the

diameter of the axon. Among vertebrates, this same function (increased speed) is brought about by ____________________.

a. insulating the axons with myelin sheath cells b. increasing the number of pumps c. increasing the number of sodium gates d. making axon terminals larger

Biology & Microbiology

In males, sterilization involves a vasectomy, which removes a portion of what structure?  

A.  vas deferens B.  epididymis C.  seminiferous tubules D.  Sertoli cells

Biology & Microbiology

A mutation that results in a change in the codon-reading pattern could result from

A) either an insertion or a deletion of a base. B) a base substitution only. C) a base deletion only. D) a base insertion only.

Biology & Microbiology

Cell division increases the number of __________ in the body

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology