Question

Xenogamy is a type of
(a)Autogamy
(b)Homogamy
(c)Allogamy
(d)Cleistogamy

Answer 1

The transfer of pollen grains from the anther to the stigma of a different plant which is a type of cross-pollination is xenogamy. It brings genetically different types of pollen grains during pollination to the stigma.

Complete answer:
Xenogamy is a type of allogamy. They are a type of cross-pollination which occurs in the sexual organs of the angiosperms plants. The anther and filaments constitute stamen which is the male part of the flower. During cross-fertilization, The ovum from one individual is fused with the spermatozoa of the other. It involves cross-fertilization between unrelated individuals that lead to the masking of deleterious recessive alleles in the given progeny. The cross-pollination involves certain characteristics that facilitate the pollination that includes herkogamy which is to avoid self-pollination by bearing a mechanical barrier on the stigmatic surface. The maturation of the Pollen on the ma of the flower at different times which is to avoid self-pollination. In certain flowers, the mature Pollen falls on the receptive stigma which fails to bring self-pollination on the same flower. Male sterility is another characteristic that facilitates cross-pollination as the pollen grains are not functional.

Additional information:
Autogamy: It is the self-fertilization or the fusion of two gametes from the same individual which is a reproductive mechanism that is adopted by many flowering plants. It is important for the flowering plant not to be dependent upon pollinating agents that rely on other plants for fertilization and is unusual to consider many plant species that are evolved to become incompatible.
Homogamy: The marriage between the individuals who are culturally similar to each other is known as Homogamy which is a form of assortative mating. The socialization customs of a particular group that is similar to socializing with one another is also known as Homogamy.
Cleistogamy: A type of automatic self-pollination in certain plants which is used by non-opening, self-pollinating flowers such as peanut and peas. It requires fewer plant resources for the production of seeds because of the development of petals and large amounts of pollen which is not required in cleistogamy.

So, the correct answer is 'Allogamy'.

Note: 75% of the flowering plants are dependent upon pollinators for their fertilization process. Fertilization involves pollination which is essential for its process and development of the fruits and seeds which are needed for reproduction.