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प्रश्न
Compare the characteristic features of insect pollinated and wind pollinated flowers. Explain how the respective features assist in pollination.
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उत्तर
Characteristic feature of insect pollinated plant :
- Flowers are large, colourful, fragnant and rich in nectar to attract insect. If flowers are small then clustered into inflorescence.
- Pollengrains produced are sticky so that it easily sticks to insect body.
- Stigma is sticky so that pollen grains stuck on insect body transfer to stigma.
Wind Pollinated Flowers:
- Produces light, non-sticky or winged pollengrain so they can be transported in wind currents.
- Anthers are well exposed so that pollens can be easily carried by wind.
- Stigma is large and often feathery to easily trap the airborne pollen grain.
- Flowers are small and inconspicuous and often packed in to an inflorescence.
- Flowers have a single ovule in each ovary.
APPEARS IN
संबंधित प्रश्न
Make a list of any three outbreeding devices that flowering plants have developed and explain how they help to encourage cross-pollination.
What is meant by emasculation?
Fill in the blank:
Male sex cells in plants are called _________.
Fill in the blanks with suitable words.
Different timings for the maturation of gynoecium and androecium is called ________.
Explain water pollination in detail with its types.
Anemophily type of pollination is found in ______.
Triple fusion in Capsella bursa pastoris is fusion of male gamete with ______.
Consider the following statements depicting adaptation of flowers to carryout successful pollination.
- Stigma is long, sticky and unwettable.
- Sepals, petals or perianth (if present) have waxy coating.
- Stamens with long filament and versatile anthers.
- Tubular corolla is seen.
- Flowers are noctumal.
Which of the above statements clearly depict hydrophily?
What is hypohydrophily?
Briefly discuss any two methods by which plants avoid self-pollination.
