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Which of the following occurs if the sampling units in an experimental cell are somehow different than the units in another cell, and this difference affects the dependent variable?
Moistening
The process of making something slightly wet or damp.
Filtering Out Dust
The process of removing dust particles from air or liquids, typically using a physical barrier or filtration system.
Oxygen
A chemical element with the symbol O, essential for cellular respiration in most living organisms and a major component of Earth's atmosphere.
Capillary Walls
The thin, permeable barriers of capillary blood vessels that facilitate the exchange of water, oxygen, carbon dioxide, and other nutrients and wastes between blood and tissues.
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