Many species of Drosophila eclose from their pupal cases at dawn. Does this eclosion occur in response to an environmental stimulus (i.e., a change in humidity, temperature, or light) or in response to an endogenous timing mechanism? A bird may fly in one direction...
CITATION STYLE
Horton, T. H. (2001). Conceptual Issues in the Ecology and Evolution of Circadian Rhythms (pp. 45–57). https://doi.org/10.1007/978-1-4615-1201-1_3
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