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ATI TEAS 7 - PRACTICE TEST 100% CORRECT!

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Diarrhea associated with cholera is caused by cholera toxin secreted by certain strains of the bacterium vibrio cholerae. A student wants to design an experiment to demonstrate the effects of acid rain on plant life. Which of the following substances should be combined with water to stimulate acid rain? A. Vinegar B. Table salt C. Baking soda D. Ammonia - ANSWER A. Vinegar Vinegar is acidic, with a pH less than 7. Adding it to the water will acidify water to stimulate acid rain. Which of the following compounds is an ionic compound? A. PCl3 B. H2O C. MgF2 D. NH3 - ANSWER C. MgF2 Each magnesium (valence = 2) atom transfers one electron to each of the fluorine (valence = 7) atoms, forming ionic bonds. Molecules formed by the transfer of electrons are called ionic compounds. Which of the following is a function of a somatic reflex?

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ATI TEAS 7 - PRACTICE TEST 100%
CORRECT!

, Which of the following is improved when repeated trials of an experiment have
consistent results?

A. Reliability
B. Validity
C. Independent Variables
D. Dependent Variables - ANSWER A. Reliability.

Reliability speaks to the repeatability of an experiment.

Which of the following diseases is primarily caused by a toxin produced by a
microorganism?

A. Cholera
B. Leprosy
C. Acne
D. HIV - ANSWER A. Cholera

Diarrhea associated with cholera is caused by cholera toxin secreted by certain strains
of the bacterium vibrio cholerae.

A student wants to design an experiment to demonstrate the effects of acid rain on plant
life. Which of the following substances should be combined with water to stimulate acid
rain?

A. Vinegar
B. Table salt
C. Baking soda
D. Ammonia - ANSWER A. Vinegar

Vinegar is acidic, with a pH less than 7. Adding it to the water will acidify water to
stimulate acid rain.

Which of the following compounds is an ionic compound?

A. PCl3
B. H2O
C. MgF2
D. NH3 - ANSWER C. MgF2

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