Given below is a flower with its characteristic features specialised for the most common type of abiotic pollination.
Answer the following questions based on the above diagram:
(a) Name the mode of abiotic pollination that will be adopted by the given plant species in the above picture.
(b) State the need of exposed large feathery stigmas for the flower.
(c) What will be the two important adaptations in the pollen grains of the flowers pollinated by the above mode of pollination?
(d)What could be the probable reason for the petals being small and non-green?
(a) The mode of abiotic pollination depicted is anemophily (pollination by wind).
(b) Exposed large feathery stigmas are needed to effectively trap airborne pollen grains from the environment, increasing the chances of successful pollination.
(c) The two important adaptations of pollen grains for wind pollination are:
(d) The petals are small and non-green because they do not need to attract pollinators (like insects or animals), as the plant relies on wind rather than biotic agents for 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.