Step 1: Understanding wind pollination (anemophily).
In wind-pollinated plants, pollen is carried by air currents. To ensure successful pollination, certain floral adaptations are present.
Step 2: Characteristics of wind pollination.
- Pollen grains are light and non-sticky so they can be easily carried by wind.
- Stamens are well exposed for easy dispersal of pollen.
- Stigmas are large and feathery to efficiently trap pollen grains.
Step 3: Eliminating the odd option.
- (A) Light pollen grain: Correct feature of wind pollination.
- (B) Well exposed stamen: Correct feature of wind pollination.
- (C) Large feathery stigma: Correct feature of wind pollination.
- (D) Multiple ovule: Not a characteristic feature of wind pollination, hence the correct answer.
Step 4: Conclusion.
The correct answer is (D) Multiple ovule, as it is not related to wind pollination.
Answer the following questions:
[(i)] Explain the structure of a mature embryo sac of a typical flowering plant.
[(ii)] How is triple fusion achieved in these plants?
OR
[(i)] Describe the changes in the ovary and the uterus as induced by the changes in the level of pituitary and ovarian hormones during menstrual cycle in a human female.
Flowering plants with hermaphrodite flowers have developed many reproductive strategies to ensure cross-pollination. Study the given outbreeding devices adopted by certain flowering plants and answer the questions that follow.
Note : All plants belong to the same species. No pollen tube growth/inhibition of pollen germination on stigma. Pollen germination on stigma.