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______ Americans, those with more than one distinctive racial heritage, have been increasing in numbers according to recent census data.
Osmosis
Diffusion of water across a selectively permeable membrane; occurs in response to a difference in solute concentration between the fluids on either side of the membrane.
Sieve Elements
Living cells that compose sugar-conducting sieve tubes of phloem. Each sieve tube consists of a stack of sieve elements that meet end to end at sieve plates.
Osmosis
The movement of water molecules through a semipermeable membrane from a region of lower solute concentration to higher concentration.
Sink Cells
Cells that act as repositories for the products of photosynthesis or other metabolic activities, often located in different parts of a plant.
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