Which of the following features is a characteristic of aquatic plants possession of ?

Analyze the question: The question asks which feature is characteristic of aquatic plants (hydrophytes), such as water lettuce, water lily, and Ceratophyllum.

Concept: Aquatic plants live in water, so they don't face water shortage. Their adaptations include:

• Thin or absent cuticle, since water loss isn't a problem
• Poorly developed or reduced xylem and supporting tissue, because water supports them
• Large air spaces (aerenchyma) for buoyancy and gas exchange
• Stomata on the upper surface of floating leaves
• Finely divided (feathery) leaves in submerged plants, which increase surface area for absorbing dissolved gases and light, and reduce resistance to water currents

Evaluating the options:

• A. Multiple epidermis: This is a feature of xerophytes (desert plants), which need to reduce water loss. Not aquatic.
• B. Heavily lignified tissue: Lignin gives rigid support, which aquatic plants don't need because water buoys them. Not aquatic.
• C. Finely divided leaves: This is typical of submerged aquatic plants, since it increases surface area for gas exchange and lets water currents flow through without tearing the leaves. Correct.
• D. Succulent stem: This is for water storage in xerophytes such as cactus. Not aquatic.

Answer: C, finely divided leaves.

Tip: Think "water is plentiful, support is free." Features that save water (multiple epidermis, succulent stems) or give strong support (lignin) belong to land and desert plants. Aquatic plants have thin, reduced, or feathery structures.