Photoperiodism the Biological Calendar


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Life evolves in a cyclic environment, and to be successful, organisms must adapt not only to their spatial habitat, but also to their temporal habitat. How do plants and animals determine the time of year so they can anticipate seasonal changes in their habitats? In most cases, day length, or photoperiod, acts as the principal external cue for determining seasonal activity. For organisms not living at the bottom of the ocean or deep in a cave, day follows night, and the length of the day changes predictably throughout the ...

Photoperiodism the Biological Calendar 2010, Oxford University Press, USA, Oxford, England

ISBN-13: 9780195335903