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 agents such as wind (anemochory), water (hydrochory), and animals (zoochory) for this purpose.
Option Analysis:
- Drumstick (Moringa): Incorrect. The seeds of the drumstick plant possess wing-like structures. These adaptations facilitate dispersal by wind (anemochory), allowing the seeds to glide through the air.
- Maple: Incorrect. Maple fruits are specialized as samaras, which have wing-like extensions formed from the pericarp. These structures allow the fruit to spin and be carried away by the wind.
- Coconut: Correct. The coconut is a classic example of a plant adapted for water dispersal (hydrochory). Its fruit has a thick, fibrous mesocarp (husk) that traps air, providing buoyancy. This allows the seed to float across large bodies of water while the hard endocarp protects the embryo.
- Sunflower: Incorrect. Sunflower fruits (cypsela) are topped with a pappus (a modification of the calyx), which forms a hairy, parachute-like structure. This adaptation enables the seeds to be easily lifted and transported by wind.
Key Takeaway:
Coconut seeds are adapted for hydrochory (water dispersal) due to their buoyant, fibrous mesocarp, whereas Drumstick, Maple, and Sunflower rely on wind dispersal (anemochory) via wings or pappus structures.