Coconut
Explanation
Seed dispersal is the process by which seeds are transported away from the parent plant to ensure survival and reduce competition. Plants have evolved specific morphological adaptations to utilize various agents of dispersal, such as wind (anemochory), water (hydrochory), and animals (zoochory).Option Analysis:
- Maple is Incorrect: Maple seeds are adapted for wind dispersal. They possess wing-like extensions (samara) that allow them to glide and be carried away by air currents.
- Coconut is Correct: The coconut fruit is a classic example of adaptation for water dispersal (hydrochory). It possesses a thick, fibrous mesocarp (husk) and a spongy outer layer. This fibrous structure traps air, providing the necessary buoyancy for the fruit to float on water and travel long distances across oceans.
- Sunflower is Incorrect: Sunflower fruits are lightweight and often associated with hairy structures or pappus, which facilitate dispersal by wind rather than water.
- Xanthium is Incorrect: Xanthium fruits are adapted for animal dispersal (zoochory). They possess stiff, hooked spines on their surface that attach to the fur of passing animals or the clothing of humans.
Key Takeaway: Plants adapted for hydrochory (water dispersal) typically develop fruits with a fibrous or spongy outer coat to ensure buoyancy, whereas wind-dispersed seeds often feature wings or hair-like structures.