Q31 - Adaptations of Submerged Aquatic Plants
Some flowering plants are aquatic and have adapted to live in aquatic environments. They are divided into 3 types, depending on how much of the plant is normally positioned inside or outside of the water. These groups include emergent, floating, and submerged plants. The organs of submerged aquatic plants grow completely under water. Indicate if each of the following statement is true or false for submerged plants.
Using the information and data, determine which of the statements are true or which are false.
A. They do not have xylem as they can absorb water from all of their surfaces.
B. Given that some species do have stomata, their opening and closing of the stomata is not expected to be driven by circadian rhythm.
C. These plants are heterophyllous, with thin and dark green leaves.
D. These plants have a well-developed supporting mechanical tissues with thick walls.
Question reproduced from IBO 2018, Theoretical Paper 1, licensed under CC BY-NC-SA 4.0 - attributed to the International Biology Olympiad. Open the full exam PDF · Community solutions (unofficial)