Entamoeba histolytica is acquired by
A. sexual contact.
B. contaminated water.
C. contaminated food.
D. ingestion of cysts of the pathogen.
E. All of the choices are correct.
Answer: E
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A person with an unapparent infection who shoes no symptoms of being infected yet is able to pass the disease on to others is called a(n) _____carrier
Fill in the blank(s) with the appropriate word(s).
Ultraviolet light has a specific effect on the DNA molecule. It causes the formation of
a. thymine dimers. b. translocations. c. deletions. d. inversions. e. duplications.
Hemicellulose contains chains of xylose molecules
____________________ Indicate whether the statement is true or false.