Biology
Which of the following is true of osmosis?

It is a type of diffusion
Movement is against water's concentration gradient
All of these
Requires energy

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Biology
Which statement concerning the diagnosis of ADHD is true?

Boys are more likely to be diagnosed with ADHD than girls
Racial minority status is a good predictor of being diagnosed with ADHD
Most children "outgrow" symptoms of ADHD
About 20 percent of school-age children are diagnosed with ADHD

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