P wave represents depolarization of the atria.

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#Id: 4640

#Unit 13. Methods in Biology

 Hydrodynamically focused stream separate cells in single file 

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#Id: 2321

#Unit 3. Fundamental Processes

Splice sites are directional in nature. 5’ splice site -the left, or donor, site and the 3’ splice site - right, or acceptor, site.

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#Id: 8345

#Unit 2. Cellular Organization

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#Id: 9868

#Unit 6. System Physiology – Plant

The photoreceptor for UV-B-induced responses is UVR8, is a seven-bladed b-propeller protein, which forms functionally inactive homodimers in the absence of UV-B

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#Id: 1446

#Unit 4. Cell Communication and Cell Signaling

Tight junctions seal off body cavities and restrict diffusion of membrane components.