Q1. A young root is growing in air in a chamber exposed to a moisture gradient. How will the root respond? What three types of "tropisms" will interact to determine the growth of the root? Are the tropisms positive or negative?
Q2. What is the difference between "short-day" and "long-day" plants? How does phytochrome play a role in this process?
Q3. A researcher is unsure about whether a plant species uses C3 or CAM photosynthesis. The research lab has a growth chamber where light can be controlled, and has sensors for detecting carbon dioxide concentration. The researcher observes the plant in the chamber for three day-night cycles. What sort of data would the researcher expect to see if the plant was C3? CAM? You may want to use a well-labeled graph to support your answer.
Q4. In a few sentences, describe how plants use stomata to regulate the passage of water and carbon dioxide into and out of leaves. How do guard cells work? What two processes are directly related to stomata, and how are these processes affected when the stomata are opened compared with when they are closed?
Q5. Why don't palm trees have rings? What makes palm trees different from trees that do have rings? Use a diagram to support your answer.
Q6. What are the four regions of a root, and what is the primary function of each region?
Q7. What is the pressure-flow hypothesis, and why does it require active transport?
Q8. Why are the names for the stages of photosynthesis- light-dependent and light-independent- appropriate? You may want to include a diagram in your answer.