Question

2. Give one example of each of the following:
(1) Self pollinated flower
(iii) Flower showing heterostyly
() Water pollinated flower
(ii) Flower showing protandry
(iv) Wind pollinated flower​

Answer 1

.Pollination is the transfer of pollen grains from anther to the stigma of a pistil.



(i)Autogamy is the transfer of pollen grains from anther to the stigma of the same flower. Anthers and the stigma lie close to each other in a way that self-pollination occurs, i.e. cleistogamous flowers, which produce assured seed-set even in the absence of pollinators.

(ii)Geitonogamy is the transfer of pollen grains from anther to the stigma of another flower of same plant. It is genetically similar to autogamy but functionally involves cross-pollination.

(iii)Xenogamy is the transfer of pollen grains from anther to the stigma of a different plant flower.

2.Wind (abiotic agent) pollinated flowers have:

(i)Light and non-sticky pollen grains.

(ii)Generally a single ovule in each ovary and numerous flowers packed into an inflorescence, e.g. corn cob.

(iii) Well exposed stamens and large feathery stigma to trap air-borne pollen grains.

(iv)Common in grass, maize, date palm, etc.