Final answer:
A common misconception about photoperiodism is the belief that temperature and light intensity indicate the season. In reality, day length is a more reliable indicator. Photoperiodism controls various plant responses and is influenced by the timing and duration of day and night, as well as the organism's internal rhythm.
Step-by-step explanation:
One common misconception when it comes to photoperiodism is the idea that temperature and light intensity are reliable indicators of season. In reality, day length is a better indicator of the time of year. Plants use the phytochrome system to sense seasonal changes, and photoperiodism controls various plant responses such as flowering, setting of winter buds, and vegetative growth. Additionally, the photoperiodic response depends on the timing and duration of day and night, as well as the internal 24-hour rhythm of the organism.