______ people have no access to a toilet (2014 figures).
A. 0.5 billion
B. 1.5 billion
C. 2.5 billion
D. 3.5 billion
Answer: C
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Huntington's disease __________.
A. can only be passed on if both parents have the allele for the disease B. can be passed on if one or the other parent has the allele for the disease C. can only be passed on if one parent has begun to show symptoms of the disease D. will not be passed on if one parent has the allele for the disease and the other does not
Recent research has concluded that there is no medical need for women to have monthly periods
a. True b. False Indicate whether the statement is true or false
Low levels of both _____ and _____ have been implicated as contributory factors in mood disorders.
A) norepinephrine; acetylcholine B) endorphins; serotonin C) GABA; serotonin D) norepinephrine; serotonin
The most important neurotransmitter involved in decision-making is glutamate
Indicate whether this statement is true or false.