1. Which of the following is NOT a common adaptation of aquatic plants in response to their environment? A. Air-filled tissues for buoyancy B. Reduced leaf surface area C. Thin cuticles to facilitate nutrient uptake D. Rapid stomatal closure in response to flooding Answer: C. Thin cuticles to facilitate nutrient uptake Rationale: Aquatic plants typically have thick cuticles to prevent water loss and protect against flooding. 2. Which of the following is a characteristic of submersed aquatic plants? A. Lignified stems B. Extensive root systems C. Floating leaves D. Lack of stomata on the upper leaf surface Answer: C. Floating leaves Rationale: Submersed aquatic plants have leaves that are adapted to be buoyant and remain under water. 3. Which of the following statements about floating aquatic plants is true? A. They rely on fish for pollination B. They have large root systems that anchor them to the substrate C. They have specialized tissues for gas exchange D. They are typically found in slow-moving or stagnant water bodies Answer: D. They are typically found in slow-moving or stagnant water bodies Rationale: Floating aquatic plants are commonly found in slow-moving or stagnant water bodies where they can remain buoyant.