Question

When pollen of a flower is transferred to the stigma of another flower of the same plant, the pollination is referred to as:
A. Autogamy
B. Allogamy
C. Xenogamy
D. Geitonogamy

Answer 1

Hint: Pollination is the process of transferring pollen grains from the male anther of a flower to the female stigma. One of the ways that plants can produce offspring is by making seeds.

Complete Answer:
Let us analyse the options to find the correct answer.
Option A: Autogamy is fusion of two gametes that come from one individual. Autogamy is predominantly observed in the form of self-pollination, It is commonly seen in many bisexual flowering plants. Therefore, this is the incorrect option.

Option B: Allogamy is the transfer of pollen grains from the anther of the one flower on the stigma of another flower, either in the same plant or in a different plant of the same species. Therefore, this is the incorrect option.

Option C: Xenogamy is the transfer of pollen grains from the anther to the stigma of a different plant. This type of cross pollination brings genetically different types of pollen grains to the stigma. Therefore, this is the incorrect option.

Option D: The transfer of pollen grains from the anther of one flower to the stigma of another flower of the same plant is called geitonogamy. This transfer involves an agent of pollination. Genetically, it is similar to autogamy since the pollen grains come from the same plant. Therefore, this is the correct option.

Thus, the correct option is D) Geitonogamy.

Note: It is to be noted that the parts of the pollinia stick to visiting insect pollinators. These visitors then carry them to other flowers to facilitate cross-pollination which is one of the two types of pollination. The other type of pollination is self pollination.