Identify the term which is not a type of pollination. 

Key Points

• Pollination is the process of transfer of pollen grains from the male part of the flower (anther) to the female part (stigma).
• The three main types of pollination are:
  • Autogamy refers to self-pollination where pollen is transferred within the same flower.
  • Geitonogamy involves the transfer of pollen from one flower to another flower of the same plant.
  • Xenogamy refers to cross-pollination where pollen is transferred between flowers of different plants.
• The term "None of the above" is not a valid type of pollination.
• The correct option here is Option 4, as it does not represent any type of pollination.

Additional Information

• Autogamy:
  • It is a type of self-pollination where pollen grains are transferred from the anther to the stigma of the same flower.
  • Autogamy ensures genetic uniformity but reduces genetic diversity.
  • Examples of autogamous flowers include pea and wheat.
• Geitonogamy:
  • It is a type of pollination where pollen is transferred from the anther of one flower to the stigma of another flower on the same plant.
  • Although it involves different flowers, the genetic material is the same, so it does not promote genetic diversity.
  • Geitonogamy is common in plants like maize.
• Xenogamy:
  • It is a type of cross-pollination where pollen is transferred from the anther of one plant to the stigma of a flower on a different plant.
  • Xenogamy promotes genetic diversity and is beneficial for adaptation and evolution.
  • Examples include apple and sunflower.