This mercury-containing chemical was once found in vaccines and thought to cause autism spectrum disorder (ASD)
A) thimerosol B) thalidomide C) PDD-NOS D) thiamin
Answer: A
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California's most extensive ecosystem, the ____ biome, is dominated by drought-resistant, fire-adapted shrubs with
small, leathery leaves.
a. temperate deciduous forest b. prairie c. desert d. chaparral e. savannah
Which of the following is NOT dependent on
the others as a source of food? a. carnivores b. herbivores c. producers d. detritivores e. decomposers
In a neutral solution the concentration of _____.
A) hydrogen ions is equal to the concentration of hydroxide ions b) hydrogen ions is less than the concentration of hydroxide ions c) water molecules is less than the concentration of hydrogen ions d) water molecules is less than the concentration of hydroxide ions e) hydrogen ions is greater than the concentration of hydroxide ions
Prokaryotic organisms were the only life-forms present on earth for almost 2 billion years. Multicellular eukaryotes have only been around for about 25% of earth's history
Answer the following statement true (T) or false (F)