Yucca plant shows _________

The correct answer is Option (4) → Moth is partner to complete life cycle

Option (1) Flower with non-sticky pollen grains — Incorrect. Light, non-sticky pollen is a feature of wind-pollinated flowers. Animal-pollinated flowers like Yucca usually have sticky pollen that coats the visitor.

Option (2) Water pollination — Incorrect. Water pollination is limited to about 30 genera, such as Vallisneria, Hydrilla and Zostera. Yucca is a land plant.

Option (3) Large feather stigma — Incorrect. A large feathery stigma traps air-borne pollen. It is again a feature of wind pollination.

Option (4) Moth is partner to complete life cycle — Correct. A species of moth and the plant Yucca depend on each other. The moth lays its eggs in the locule of the ovary, and the moth pollinates the flower.

NCERT Extract:
Pollination – “… In some species floral rewards are in providing safe places to lay eggs; an example is that of the tallest flower of Amorphophallus (the flower itself is about 6 feet in height). A similar relationship exists between a species of moth and the plant Yucca where both species – moth and the plant – cannot complete their life cycles without each other. The moth deposits its eggs in the locule of the ovary and the flower, in turn, gets pollinated by the moth.”