A group of medications that induce stimulation of the central nervous system are _______________.
Fill in the blank(s) with the appropriate word(s).
amphetamines
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Crown corrosion of concrete wastewater distribution systems is the result of
A) acidic fermentation products reacting with the gypsum in the concrete. B) sulfate reduction in the sewage and sulfide oxidation in the oxic headspace above. C) fungal growth in the concrete. D) rapid iron reduction coupled to pyrite dissolution.
The smallest particles occurring in soil are referred to as
A) clay. B) gravel. C) sand. D) silt.
Proto-oncogenes can be converted to oncogenes by:
a. mutation. b. tumor suppressor genes. c. growth factors. d. transcription factors. e. infection by certain viru
Which of the following is a neural tube defect that involves incomplete development of the brain and results in stillbirth or death shortly after birth?
A) neurulation B) spina bifida C) anencephaly D) morphogenesis