Question

The pollination of two flowers on different plants is known as
a)Xenogamy
b)Geitonogamy
c)Cleistogamy
d)Dichogamy

Answer 1

Hint The process of transferring pollen grains from the anther of a flower to the stigma of the same or other flower is known as pollination. Pollination can be either self-pollination or can be cross-pollination. Sometimes pollination needs to be done by the pollinating agents also.

Complete answer:
Xenogamy is the pollination method that works on the principle of cross-pollination. In this type of pollination, the pollen grains from the flower of a plant are transported to the stigma of the flower of the other plant. In this type of pollination pollinating agents are required for successful transfers of pollen grains. In this type of pollination, the pollen grains which arrive at the stigma are genetically different from each other. Examples of the plants that pollinate by xenogamy are papaya, onions, squash, spinach, etc.

Additional information:
- Geitonogamy is the process of pollination in which the transfer of pollen grains of one flower occurs on the stigma of the other flower which is present on the same plant. It is a form of self-fertilization. The wind is the pollinating agent in this type of pollination.
-Cleistogamy is the form of self-pollination in which the flowers remain closed and the pollen are transferred to the stigma of the flower. In this, the chances of stigma getting different types of pollen are very less as the flower remains closed. Also, they don’t need any pollinating agent for pollination.

So, the answer is ‘xenogamy’.

Note: The flowers need pollinating agents like wind, water, and insects for pollination of pollens. The pollens which require pollinating agents are made in such a way that they may get easily transferred to the stigma of the required plant.