1.8. Agents of Pollination WIND AND WATER

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Across
  1. 1. Some examples of water pollinated plants are Vallisneria and Hydrilla which grow in fresh water and several marine sea-grasses such as ..........
  2. 3. As against this, you would recall that water is a regular mode of transport for the male gametes among the ............... such as algae, bryophytes and pteridophytes.
  3. 7. most of the water-pollinated species, pollen grains are protected from wetting by a ......... covering.
  4. 10. Both wind and water pollinated flowers are not very ......... and do not produce .......
  5. 13. In a majority of aquatic plants such as water hyacinth and water lily, the flowers emerge above the level of water and are pollinated by ..... or wind as in most of the land plants.
  6. 14. To compensate for this uncertainties and associated loss of pollen grains, the flowers produce enormous amount of pollen when compared to the number of ......... available for pollination.
  7. 16. pollination flowers often possess ........ stamens (so that the pollens are easily dispersed into wind currents, and large often-..........stigma to easily trap air-borne pollen grains.
  8. 17. In Vallisneria, the female flower reach the ............. by the long stalk and the male flowers or pollen grains are released on to the surface of water.
  9. 18. Majority of plants use ....... agents for pollination.
  10. 19. In another group of water pollinated plants such as .............., female flowers remain submerged in water and the pollen grains are released inside the water.
Down
  1. 2. In the corn cob – the ears you see are nothing but the stigma and style which wave in the wind to .........
  2. 4. Pollination by ....... is more common amongst abiotic pollinations.
  3. 5. Plants use two ......... (wind and water) and one Biotic (animals) agents to achieve pollination.
  4. 6. Pollen grains in many such species are long, ............. and they are carried passively inside the water; some of them reach the stigma and achieve pollination.
  5. 8. Pollen grains coming in contact with the stigma is a ........ in both wind and water pollination.
  6. 9. Wind-pollination is quite common in ......
  7. 11. Pollination by water is quite rare in flowering plants and is limited to about 30 genera, mostly ...........
  8. 12. Wind pollination also requires that the pollen grains are light and so that they can be transported in wind currents. Wind pollination also requires that the pollen grains are ...... and ......so that they can be transported in wind currents.
  9. 15. It is believed, particularly for some bryophytes and pteridophytes, that their distribution is limited because of the need for ...... for the transport of male gametes and fertilisation.
  10. 19. Only a ....... proportion of plants use abiotic agents.
  11. 20. Wind-pollinated flowers often have a ....... in each ovary and numerous flowers packed into an inflorescence.