Context: Plant circadian rhythms tell the plant what season it is and when to flower for the best chance of attracting pollinators. Behaviors showing rhythms include leaf movement, growth, germination, stomatal/gas exchange, enzyme activity, photosynthetic activity, and fragrance emission, among others. Circadian rhythms occur as a plant entrains to synchronize with the light cycle of its surrounding environment. These rhythms are endogenously generated and self-sustaining and are relatively constant over a range of ambient temperatures. Important features include two interacting transcription-translation feedback loops: proteins containing PAS domains, which facilitate protein-protein interactions; and several photoreceptors that fine-tune the clock to different light conditions. Anticipation of changes in the environment allows appropriate changes in a plant's physiological state, conferring an adaptive advantage. A better understanding of plant circadian rhythms has applications in agriculture, such as helping farmers stagger crop harvests to extend crop availability and securing against massive losses due to weather.

Question: What is the plant expression of circadian rhythm?
Answer: when to flower

Question: What do plants need to attract to their flowering?
Answer: pollinators

Question:  With what feature of environment do plants need to be in sync?
Answer: light cycle

Question: What does adaptive advantage allow for plants?
Answer: Anticipation of changes

Question: Where can an understanding of circadian rhythms of plants be an advantage?
Answer: agriculture

Question: What plant behavior is not controlled by circadian rythems??
Answer: Unanswerable

Question: What are constant but not self sustaining?
Answer: Unanswerable

Question: What needs to be in sync with ambient temperatures?
Answer: Unanswerable