Qio Rule, Van't Hoff Rule 



The rate of response of a process in an organism is often 

 doubled or more for each increase of 10C. of temperature 

 within certain limits. 



Quadrat 



A sampling area, originally square, most commonly one 

 square meter, used for analyzing vegetation. A major quadrat 

 is usually 10 meters square, cf. Plot, Permanent quadrat. 



Quadruped 



An animal with four feet, e.g., cow. 



Quagmire 



Soft, wet, boggy ground which quakes or yields underfoot, 

 cf. Bog. 



Quantum 



A unit of energy that is emitted by a Photon (q. v.). 



Quaternary 



The latest geologic period of the Cenozoic era which 

 began about one million years ago, includes the Recent and 

 Pleistocene epochs. 



Quotient of Similarity 



See Index of similarity. 



