Which of the following is transmitted by the fecal-oral route?

A) Entamoeba histolytica
B) Plasmodium
C) Schistosoma
D) Trichomonas
E) Schistosoma and Trichomonas


A

Biology & Microbiology

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Both Giardia lamblia and parvum are resistant to chlorine

Indicate whether this statement is TRUE or FALSE.

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Insertion of a gene into another organism's DNA so that it can be transferred to another organism like a bacterium is called

A) vector transfer. B) PCR. C) DNA amplification. D) gene therapy. E) DNA translocation.

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Consider the following situations: (1 ) a magnesium atom and two chlorine atoms join together to form a molecule of magnesium chloride; (2 ) water molecules interact with each other in a beaker; and (3 ) two carbon atoms and six hydrogen atoms join

together to form ethane. Rank the strength of the bonding interactions taking place in each situation, from the weakest bonds to the strongest bonds. A) 1 < 2 < 3 B) 3 < 2 < 1 C) 2 < 3 < 1 D) 2 < 1 < 3

Biology & Microbiology

How do birth control pills prevent fertilization?

A. They prevent follicle development and ovulation. B. They prevent implantation. C. They alter the uterine environment so that sperm cannot survive. D. They inhibit menstruation. E. The provide hCG, indicating that fertilization has already occurred.

Biology & Microbiology