Quiz: Short-Answer Questions

Instructions: Answer the following questions in two to three sentences, drawing exclusively from the information provided in the source material.

1. What is physiological plant ecology, and what fundamental principle governs its study?
2. According to the models by Klotz and Jacobson, how does water’s molecular organization impact proteins and DNA within a plant cell?
3. How does water stress specifically affect the synthesis of DNA and RNA in plants such as the tomato?
4. Explain the concept of “cardinal temperatures” and list three factors that can cause them to vary for a specific plant function.
5. What is the relationship between low temperatures, abscisic acid, and gibberellic acid in the process of breaking seed dormancy?
6. Describe the key differences in photosynthetic response to light intensity between plants adapted to sun and those adapted to shade, as observed in Solidago virgaurea.
7. Define photoperiodism and list the four categories of plants classified by their photoperiodic flowering responses.
8. What is phytochrome, and how do its two forms regulate a plant’s response to the relative lengths of day and night?
9. Identify the volatile terpenes produced by Salvia leucophylla and explain their mechanism for inhibiting the metabolic processes of other plants.
10. How do plant-produced inhibitors from early invader species in old-fields affect the process of ecological succession?

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