Random assignments is important in grouping participants in a research study because a. it eliminates variability in the research design b. it enables the data to be collected for analysis c. it balances out the differences that might naturally exist between participants

Are these strong bases, neutral, strong acids, weak acids or weak base household bleach (ph=12.6) fluid in a car's battery (ph of less than 1.0) milk (ph=6.7) stomach contents (ph=2.2) pure water (ph=7)

Which of these statements is true about autotrophs, but not heterotrophs? a. they use sugar and oxygen to make carbon dioxide and water. b. they use chlorophyll and oxygen to make carbon dioxide and water. c. they use sunlight, water, and carbon dioxide to make sugars. d. they use sunlight, water, and oxygen to make chlorophyll.

When rutherford performed his metal foil experiment, he was surprised that most of the alpha particles