Teleology 



The belief that the processes of nature are directed to- 

 wards some end or goal such as plants store starch for the 

 purpose of surviving. 



Telotaxis 



The direct orientation of an organism to the gradient of 

 a stimulus, known only in response to light, cf. Taxis, Tropo- 

 taxis. 



Temperate Zone 



The portions of the earth in the northern and southern 

 hemispheres between the Tropics (q. v.) and the polar circles 

 2327' from the poles, cf. Frigid zone. 



Temperature Coefficient 

 See Q 10 . 



Temperature, Effective 



The temperature above a certain minimum, at which 

 physiological processes such as growth of an organism are 

 active, considered 5C (41 F.) for many plants. 



Temperature Inversion 



See Inversion, temperature. 



Temperatures, Cardinal 



The minimum, optimum, and maximum temperatures 

 for the growth of an organism or organ, or for a process or 

 activity. 



Temperature Summation 



The summing of effective temperatures or Day-degrees 

 (q. v.) for a period of time or for the length of time required 

 for the development of an organism or organ. See Aliquote. 



Temperature Zero 



The temperature below which a number of physiological 

 processes of an organism cease or are carried on at a very 

 slow rate. cf. Temperature, effective. 



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