A water molecule could move all the way through a plant from soil to root to leaf to air and pass through a living cell only once. This living cell would be a part of which structure?
A) the Casparian strip
B) a guard cell
C) the root epidermis
D) the endodermis
E) the root cortex
Answer: D
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Biology
- Xylem vessels, found in angiosperms, have a much greater internal diameter than tracheids, the only xylem-conducting cells found in gymnosperms. The tallest living trees, redwoods, are gymnosperms. Which of the following is an advantage of tracheids over vessels for long-distance transport to great heights?
- Which of the following statements is false concerning the xylem?
- Active transport would be least important in the normal functioning of which of the following plant tissue types?
- Which of the following statements about transport in plants is false?
- Transpiration in plants requires all of the following except
- Which of the following is responsible for the cohesion of water molecules?
- Which of the following has the lowest (most negative) water potential?
- Water potential is generally most negative in which of the following parts of a plant?
- In which plant cell or tissue would the pressure component of water potential most often be negative?
- What is the main force by which most of the water within xylem vessels moves toward the top of a tree?
- What drives the flow of water through the xylem?
- If isolated plant cells with a water potential averaging -0.5 MPa are placed into a solution with a water potential of -0.3 MPa, which of the following would be the most likely outcome?
- One would expect to find the highest density of aquaporins in which of the following?
- One is most likely to see guttation in small plants when the
- The following factors may sometimes play a role in the movement of sap through xylem. Which one depends on the direct expenditure of ATP by the plant?
- Pine seedlings grown in sterile potting soil grow much slower than seedlings grown in soil from the area where the seeds were collected. This is most likely because
- Which of the following is not an important component of the long-distance transport process in plants?
- In plant roots, the Casparian strip is correctly described by which of the following?
- What is the role of proton pumps in root hair cells?
- Which of the following statements about xylem is incorrect?
- All of the following involve active transport across membranes except
- Root hairs are most important to a plant because they
- Which of the following would likely not contribute to the surface area available for water absorption from the soil by a plant root system?
- Which of the following statements is false about bulk flow?
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