PCB 3044 Lecture Notes - Lecture 4: Stoma, Evapotranspiration, Tonicity

• School: UCF
• Department: Process Cell Biology
• Course: PCB 3044
• Professor: Katherine Mansfield

Document Summary

Chap 4: coping w/ environmental variation: to & h2o. Organisms have to opt for coping w/ environmental variation: + avoidance: each species has a range of environmental tolerances that determines its potential geographic distribution. Physical environment influe(cid:374)ces orga(cid:374)is(cid:373)"s success i(cid:374) 2 ways: + affects ability to obtain energy & resources (to maintain metabolic function, grow. + extreme environmental conditions affect survival (exceeding tolerance limits) Plants r good indicators of physical environment: + limiting factors: low to & drought -> affect reproduction & survival. + climate envelope: range of condition over which a species is found. Responses to environmental variation: physiological processes have optimal condition for function, deviations from optimum rate of process. + stress: environment change -> rates of physiological processes. + acclimatization: adjusting to stress thru behavior/ physiology; short-term, reversible process. + natural selection -> adaptation of population to environmental stress: Individuals w/ traits that enable them to cope w/ stress r favored.